The excuse for Islam goes all the way back to Hagar and her son by Abraham Ishmael. Check it out. This is why Muslims will not/cannot love Christians.
A family fight combined with a religious one....
two of the worst kinds combined....
not twice as bad, its exponentially as bad.
the ishmael piece was used by Mo to give the Arabs a central focus point to set up the empire. He added that to the black stone of Elagabalus and the Arian/Gnostic writings and Manichaen ideas of heaven to create an army