That's a really interesting ethical question. It's what the right wight asks: most immigrants are fine, but 1/20 will be radicalized, even commit terrorism acts

That's a really interesting ethical question. It's what the right wight asks: most immigrants are fine, but 1/20 will be radicalized, even commit terrorism acts such as mass murder, do we take the bargain? French president Francois Hollande testified in court that he knew and took the bargain, then, we had Bataclan, Samuel Paty, and so on (please don't make me do the exhaustive list). Now the question is, what would make one decide to apply whatever answer they give here, but not there? Definitely food for thought!