But does it really matter? We are speaking about American and broader Western interests. If more Shia kill more Sunni and they in turn kill more Alawites or whoever, why do we need to be concerned?
Iraq: back back in the day, US really depended on oil coming from the Middle East. This problem was eventually resolved by fracking.
Tell me, if we don't care about Shia killing Sunnis, and we definitely don't care about Jews killing Muslims... why should we care about Muslims killing Jews? I'm Christian.