Syria is in a 4 way war that we shouldn't be involved in

Just who's side are we on when it comes to The Syrian Civil War? We all know for sure that we don't like The Islamic State. We have also bombed The Syrian Government recently. So that leaves the two rebel groups.

Our Turkish allies don't get along with our Kurd allies. What are we going to do about it? Why do we have to do something about it? How is helping Syria helping us? How did helping South Vietnam help us? How did rebuilding Iraq help us? How did creating a void of leadership in Libya help us? Why do we have to involve ourselves in foreign conflicts that have absolutely nothing to do with us?

Also why are we trying to make enemies out of counties that are no threat to us what so ever?

When are we going to stop getting ourselves needlessly involved?