Is that sort of like the Shites that tried to overthrow Saddam after Gulf War I.. and the Bathists that killed tens of thouasnds of Shites in return?
Anyone who thinks Muslims won't kill Muslims for any reason, thinks that Saddam attacking Kuwait was just a desert mirage.
Human life is cheap in the Muslim world. For much of the last 1200 years the cheapest of all lives is a fellow Muslim's life.
For a Clue visit one of the mass graves where Saddam killed tens of thousands of Muslims. Saddam ordered Muslims to kill Muslims and they did it gladly.
None of your instances of Muslim fighting Muslim -- were cases of fighting to sustain a "democratic government" put in place by a infidel army..
Perhaps if we reinstall the Bathists, and reinstall a Sunni Dictator -- we could expect a repeat performance..
RECENT history, doesn't show any great enthusiasm on the part of "Free Iraqi Forces" to conduct offensive action against their fellow "citizens"....or imported Jihadists for that matter.
Did I miss the reports -- of Iraqi "Military/Police" conducting offensive action against the militant Islamists in Iraq --- WITHOUT the majority presence of coalition forces?
Have you got any other "clues"?
Semper Fi