So the "terrorist" attack we had happened even without sheltering refugees fleeing from the mess we made. yet we need to block the refugees to prevent the "terrorism".
While you live, shine / Have no grief at all / Life exists only for a short while / And time demands its toll.
Yeah, refugees go through waaaay more screening than normal visa applicants. Even the weakest whiff of extremist ties can get you denied. Distant family member you've never met get picked up on suspicion of terrorism at some point? Denied.
You're at less risk among approved refugees than you are doing your christmas shopping among strangers.