I think we start by recognizing that ISIS are a bunch of penny-ante gloryhounds that want nothing more than the legitimacy of engagement with a prime conventional force. They don't have to win; when martyrdom is a major plank in your platform your cause is advanced simply through engagement.

Nobody has ever worried about Libyan pirates taking over the world. Sure - wrong-headed apocalyptic idiots may align with an eschatological Wahibi sect and cause real violence. But they sure as fuck won't come from Iraq. You want to nip ISIS in the bud? Treat muslims at home like humans and give them less to relate to when they look at the shitheels hamming it up in the Fertile Crescent. There's a whole lotta Islam and the more you paint the guys in Detroit to look like the guys in Damascus the less they belong to your society.

Islamic terrorism in the US and Europe is entirely the product of islamic denigration in the US and Europe. We cut that shit out and nobody will give a fuck about the crazies in the middle east. Ain't nobody in the US aligning with Boko Haram. You make ISIS seem as foreign and unrelatable as Boko Haram and the domestic problem becomes foreign affairs.

PS I'm drunk.