[zaphar]

I'm sure that's part of it. But a clear eyed reading of their own religious beliefs and proclamations shows that they are also quite intent on converting the entire world over to their religion or else slaughtering. I'm not sure your suggestion is enough. How would you encourage the hard line believers (also most likely to become terrorists) to abandon that belief system?

I'll note that part of their complaint is also that we export our culture via economic methods. Would you also withdraw from all interaction with areas they currently control including humanitarian and immmigration? This would prevent people of that cultural heritage who live here from sending aid to those societies legally. And this only barely touches on just how complicated this all is. The discourse around much of all of this is full of motivated thinking on both sides and a massive amount of oversimplification of the problem.