You said,
> Clearly whatever is being done is insufficient and that's why there are attacks by Islamists.
If, as the parent is hinting, there have been few-to-no attacks by immigrant Islamists (and few attacks by Islamists of any stripe) in the US, I don't see how it's remotely clear that "whatever is being done is insufficient". What the hell does "sufficient" look like?
> Do you want America to be like France where because of insufficient immigration controls they get an attack every so often from these Islamic immigrants?
Personally? Maybe. If the cost of getting rid of it was zero, then no, of course not. But I choose to bear much higher risks because I don't like the trade-offs necessary to eliminate them. There is no reason this should be different.