Allow me to provide the evidence.
What Muhammad said about Muslims fighting eachother;
Bukhari Volume 1, Book 2, Number 30:
Narrated Al-Ahnaf bin Qais:
While I was going to help this man ('Ali Ibn Abi Talib), Abu Bakra met me and asked, "Where are you going?" I replied, "I am going to help that person." He said, "Go back for I have heard Allah's Apostle saying, 'When two Muslims fight (meet) each other with their swords, both the murderer as well as the murdered will go to the Hell-fire.' I said, 'O Allah's Apostle! It is all right for the murderer but what about the murdered one?' Allah's Apostle replied, "He surely had the intention to kill his companion."
Bukhari Volume 9, Book 88, Number 204:
Narrated Al-Hasan:
(Al-Ahnaf said I went out carrying my arms during the nights of the affliction (i.e. the war between 'Ali and 'Aisha) and Abu Bakra met me and asked, "Where are you going?" I replied, "I intend to help the cousin of Allah's Apostle (i.e.,'Ali)." Abu Bakra said, "Allah's Apostle said, 'If two Muslims take out their swords to fight each other, then both of them will be from amongst the people of the Hell-Fire.' It was said to the Prophet, 'It is alright for the killer but what about the killed one?' He replied, 'The killed one had the intention to kill his opponent.'"
What Muhammad's Muslim family did after his death;
Bukhari Volume 5, Book 57, Number 116:
Narrated Abu Wail:
When 'Ali sent 'Ammar and Al-Hasan to (the people of) Kufa to urge them to fight, 'Ammar addressed them saying, "I know that she (i.e. 'Aisha) is the wife of the Prophet in this world and in the Hereafter (world to come), but Allah has put you to test, whether you will follow Him (i.e. Allah) or her."
It is a well known fact that Muslims fought Muslims under Ali and Aisha.
Incredible, some of the first of Muhammads followers to disregard Islamic brotherhood, were prominent members of Muhammads immediate family.
So Sardab, what you were saying about Christian hypocrisy, doesn't it also apply to Muhammads very own family?