Yeah...and the best we can hope for is for them to keep on doing it !
Actually, there is nothing new there..the Sunnis have been killing the Shiites and vice -versa... The goo-goo tribe has been fighting the wah-wah tribe for 1500 years, while the Muslims who live in caves have been fighting the Muslims who live in clay houses, for nearly as long.
Then there are the Islamists who ride horses, versus the ones who ride camels..to say nothing about those who prefer goats..
So perhaps President Trump is correct about vacating that place of continuous war !