However, it does come down to either destroying ISIS on its turf or scrambling to defend against it on ours. Obama decided to roll the dice on our national security and do next to nothing there. As a result, they're coming here.
We should do all it takes to keep them from coming here ... or if they do come I have no doubt that we can dispatch them forthwith. Not worried too much about that. The American people are not going to put up with that BS over here.
However, they keep making more of them. Best strategy is to keep them contained ... but we will never reform their constant (over 1000) years of tribal and religious warfare.
Keep it over there. Let them kill each other as they are wont to do. Why get in their way?
Obama was more concerned with arming the wobbly groups against Assad rather than leading a coalition to send the ISIS from the Middle Ages to the Stone Age.