Muslims Killing Muslims...
Whoever kills a believer intentionally his recompense is Hell to abide therein (for ever): and the wrath and the curse of Allah are upon him and a dreadful penalty is prepared for him.  Qur'an 4: 93
 
LET US RETURN TO THE DAYS WHEN OUR RELIGION
"AL-ISLAM"  WAS PERFECTED BY ALLAH (S.W.T.) HIMSELF...
"This day, I have perfected your religion for you and have completed My favor unto you. And, have chosen for you as religion AL-ISLAM."  Qur'an 5: 3.
 
THE PERFECT ISLAM WAS "DE-ISLAMIZED" INTO SECTS WHEN THE "POLITICAL DISCORDS" PREVAILED OVER THE ALLAH'S COMMAND:-
As for those who divide their religion and break up into sects you shall have no part in them in the least: their affair is with Allah: He will in the end tell them the truth of all that they did. Qur'an 6: 159.
The Major Discord after the passing away of the Prophet (s.a.s.):

1.  Political Differences:

Muslim history witnessed a lot of turmoil and disorder after the murder of 'Uthman, the third Caliph, writes Dr. Suhaib Hasan Abdul Ghaffar a graduate from Islamic University at Medina, Saudi Arabia for higher studies  in the faculty of Shari'ah in his book Criticism of Hadith among Muslims with reference to Sunan Ibn Maja. Continuing further, Dr. Suhaib Hasan writes; Battles between supporters of 'Ali and those of A'isha and later those of Mu'awiya led to the creation of the Shi’a and Khawarij. A great deal of fabricated Hadith in favour of Ali and the house of the Prophet came from Shi’a themselves, as admitted by a well-known Shi’a source. page 35.

Ibn Abi al-Hadid says:

     “Lies were introduced in Hadith on merits originally by Shi’a. They in the beginning fabricated many Hadith in favour of their man motivated by enmity towards their opponents. When Bakriyya (the supporters of Abu Bakr), found out what Shi’a had done they fabricated on their part Hadith in favour of their man.” Source: Sharh Nahj al-Balagha, Dar al-Kutub al-Arabiya al-Kubra, Cairo, 1: 135.

He also speaks of a handsome reward declared by Mu'awiya for anyone fabricating Hadith against 'Ali. Continuing further, little later Dr. Suhaib Hasan writes:

Iraq had been the central place for much of this business.

A’isha is reported to have said:

“O people of Iraq, the people of Sham (Syria) are better than you. A great number of the Companions of the prophet went to them. So they reported to us what we know. But to you a small number of them went. But you reported to us what we know and what we did not” Source: Ibn 'Asakir: al-Tarikh al-Kabir. 1: 69.

Mukhtar al-Thaqafi said to one Ansari:

“Invent Hadith on the authority of the Prophet saying that I would be the Caliph after him who would ask vengeance for his son. If you do so you would receive ten thousand Dirham, a fine dress, an animal to ride and a servant to serve. The man refused to do so on the authority of Prophet but he accepted his offer with less money to fabricate on the authority of the Companion.” Source: Ibn al-Jauzi. al-Muduat al-Kubra, 1: 4.

'Abd al-Rahman b al-Mahdi reported to Malik that the amount of Hadith he heard in Medina during forty days was no more than what he heard in Iraq in one day. On hearing this, Malik remarked (addressing the people of Iraq):

“From where did you get this coinage? You make it at night and let it circulate the following day.” Source: Ibn Taimiya: al-Muntaqa min Minhaj al-I'tidal, p. 88.

2.  Factions based on issues related to faith:

Dr. Suhaib Hasan writes; During the last days of the Umayyad Caliphate and throughout the 'Abbasid period, a number of issues related to faith and attributes of Allah were raised. The discussion led to the creation of various factions known as Qadariyya, Jabariyya, Mu’tazila, Murji’a, Mujassima, and Mu’atila.

Contradictory Hadith either supporting one opinion or rejecting it were fabricated by the supporter of each opinion. page 37.

4. Story-tellers:

Amazing stories full of incredible events and attractive exposition were always a source of inspiration for the common man. This is what the story-tellers used to do in mosques. To give credence to their material, they used to precede it with a full Isnad. Most of such narrations were strongly rejected by the traditionists. page 39.

5. Ignorant Ascetics:

In order to let the people devote much of their time to supererogatory forms of worship, ascetics used to fabricate Hadith on merits of various actions. About four hundred such Ahadith are known to be invented by Ghulam Khalil, (d. 275 A.H.) one of the renowned ascetics in Baghdad whose death caused the whole market to close its doors in mourning. Source: Khatib: Tarikh al-Baghdad, Sa'ada Press, Cairo. 1931. 5 : 79

Note: To read the left out texts and the not included sub-headings (out of 1 to 8)
it is highly recommended to read the earlier cited book by Dr. Suhaib Hasan Abdul Ghaffar,  Published by Ta Ha Publishers Ltd., London and Al-Qur'an Society, London. 1986. ISBN 0 907461 56 5.
THE QUR'AN WAS MADE MAHJUR (OUT OF USE, OBSOLETE), WHEN THE "THEOLOGICAL DISCORDS" WERE IMPLANTED BY THE SATAN...
 
Read carefully Allah's Warning and the Prophet's Apprehension:
(The wrong-doer will say) "Oh, woe to me! Would that I had never taken such a one for friend! Verily, he led me astray from the Message (of Allah) after it had reached me! Ah! the Satan is for man an arch betrayer!" And the Messenger will say:  "O my Lord! Truly mine own folk has made this Qur'an out of use Mahjur." And, thus We set for every Prophet an enemy from among the guilty;
But your Lord is Sufficient for a Guide and as a Helper.  Qur'an 25: 28-31.
1. THIS VERSE CONFIRMS... Muslims will be led astray, from the Revealed Message, by Satan the accursed whose primary mission is to intercept the Believers from the STRAIGHT PATH to Allah. But, this life is our test and we should trust the WORDS OF ALLAH (S.W.T.) to reach HIM.
 
2. THIS VERSE CONFIRMS... Satan - the traitor, will not approach the Believers as a non-Believer but as a MUSLIM BROTHER or SISTER, acting as their friend and well wisher, but he is NOT. The Satan will divert Muslims from the REVEALED MESSAGE OF ALLAH.
 
3. THIS VERSE CONFIRMS... that the Believers will be beguiled and captivated by the Satan's propagated FALSEHOOD. Those beguiled will abandon and forsake ALLAH'S MESSAGE and would rather rigidly uphold THE FALSEHOOD.
 
4. THE LAST LINE OF THIS VERSE CONFIRMS the WORDS of Allah are Sufficient as a GUIDE to show the Straight Path leading to Allah. It also tells us that Allah's Help is for those who hold fast to Allah's Guidance.

READ THE FOLLOWING REALITY OF THE DAY AND THINK...

During the EID SALAT an Imam leading the Eid Prayer normally declares that he will recite the Salat as per the teachings of his Mazhab which could be either Hambli, Hanafi, Shafi, Wahabi or Jaffery Tariqah of Islam. And, the Congregation would unquestionably submit to the rules and teachings of that IMAM of the Pesh-Imam. The fundamentally important question is:

If the disobedience of the Pesh-Imam's IMAM or the SCHOOL OF A SECT can make the Eid Salat null, what about the DAILY DISOBEDIENCE OF ALLAH ?

Allah has commanded us ALL, irrespective of the SECTS we choose to follow, to recite OUR PRAYERS in the MIDDLE TONE. DOES NOT RECITING THE PRAYERS SILENTLY, instead of in the MIDDLE TONE, MAKE OUR PRAYERS NULL AND VOID?

Neither speak thy Prayer aloud nor speak it in a low tone but seek a middle course between. Qur'an 17: 110

UNTIL we see the TERMINATION of this DAILY DISOBEDIENCE happening in ALL the Mosques, irrespective of the SECTS or MAZHABS, the Muslim Brotherhood would continue to make the Words of Allah Mahjur (obsolete, forsaken). ALLAH'S DAILY DISPLEASURES DRIVES THE MUSLIM UMMAH AWAY FROM HIS FAVOUR, THAT HE HAD COMPLETED. 

MAKING ALLAH'S WORD ABOVE ALL OTHER TEACHINGS AND PRACTICES IS THE ONLY VIABLE SOLUTION TO GO BACK TO THE DAY WHEN ALLAH HAD PERFECTED THE DEEN  AND COMPLETED HIS FAVOUR. LET US MAKE SINCERE EFFORTS TO BRING BACK THE BOOK OF ALLAH TO ITS SUPREME STATUS WHEN AL-ISLAM  WAS GIVEN TO US AS "THE PERFECT RELIGION".

IF NOT, THE MUSLIMS WILL KILL MUSLIMS AND THE POLITICAL AND THEOLOGICAL DISCORDS WILL DOMINATE THE UMMAH... ONE ALLAH, ONE BOOK, ONE VOICE...   

Here is Allah's answer to those who may talk of the Sunnah and Tawatur:

Perfected is the Word of thy Lord in truth and justice. There is none that can change His words. He is the Hearer, the Knower. Qur'an 6: 115.

It is not (possible) for any human being unto whom Allah had given the Scripture and wisdom and the Prophethood that he should afterwards have said unto mankind: Be slaves of me instead of Allah; but (what he said was): Be you faithful servants of the Lord by virtue of your constant teaching of the Scripture and of your constant study thereof. Qur'an 3: 79.

No change wilt thou find in the practice (approved) of Allah.  Qur'an 48: 23.

No change can there be in the Words of Allah. This is indeed the Supreme
Triumph. Qur'an 10: 64.
 
Say: (O' Prophet) "I but follow what is revealed to me from my Lord: This Qur'an from your Lord has Guidance and Mercy for any who have faith. Qur'an 7: 203.

THE ABOVE VERSES LEAD US TO CONCLUDE WITH FAITH THAT:

Any material, written or otherwise that claims directly or indirectly that the Prophet had either Ordered or himself Practiced anything contrary to the MESSAGE that was REVEALED through him, is a Falsehood in his name... 
The concept of Prophet having over-ruled the MESSAGE, is a blasphemy...

Here is the First and the Foremost, Eternally Valid Command that Adam got from Allah for himself and for his progeny to come:

We said: "Get ye down all from here; and surely there will come to you GUIDANCE FROM ME". Whosoever follows MY GUIDANCE on them shall be NO FEAR nor shall THEY GRIEVE. "But those who reject Faith and belie Our Signs they shall be Companions of the Fire; they shall abide therein.
Qur'an 2: 38 - 39.

The entire Muslim Brotherhood is in the Fear and Grieves these KILLINGS.

Invite (all) to the way of thy Lord with wisdom and beautiful preaching; and argue with them in ways that are best and most gracious. Verily thy Lord knoweth best who have strayed from His Path and He knows best who are on the right path. Qur'an 16: 125