We have far more pressing matters to attend to at home.
I'd say thousands of people being killed and millions of refugees are pretty pressing. On the other hand, it's not clear our involvement is going to do any good at all. The policy is shaping up to be is so far afield from adhering to the Weinberger/Powell doctrine - even to the extent of having a realistic intention of winning
anything through the use of military force beyond saving face / feeling good about ourselves - I'm afraid this will end up being Gulf of Tonkin without the Resolution.