This scenario has been played out in the ghettos, the old west etc. all over the world since the caveman days. Shakespearian scenarios.
Al Running Bear...
I just wished one side was a different color, then I would know who to cheer for.
Religious sects, gangs, tribes, clans and militias are a bunch of peas in the same pod of violence that has engaged Lebanon fairly constantly for the last 40+ years.
Actually, since the beginning of the Muslim conquests, seldon has the Levant (the eastern shore of the Mediterranean from the Turkish border down to Palestine) been internally at peace, all on its its own, with peace usually imposed by one of the strong neighbors playing a role of occupier or siding with one group in dominance over the rest.
The only obvious answer is to bring them all to American cities where they can live off the US welfare, education and healthcare system.