Deeper inspection finds that once the religious question is answered, then the violence is political: sunni versus shiite. Seems to me the solution to the violence for the US is to let the Muslims live somewhere else where they can continue to fight as much as they want. It clearly makes no sense to me to let more Muslim refugees into the US.
Because there are still those who do not believe exactly as they do.
With Islam it would appear that it’s violence for it’s own sake.