Because the USA government funded ISIS to begin with? There is no advantage to removing ISIS they aren't a threat to the US but are anti-Assad so they support o

Because the USA government funded ISIS to begin with? There is no advantage to removing ISIS they aren't a threat to the US but are anti-Assad so they support our interests in the region indirectly. Furthermore they are great scapegoat for an executive government power grab and building a surveillance state. It doesn't hurt that prolonged military engagements do wonders for the profits of the military-industrial complex either.