That is a good point , I agree that their limits are more real than they admit.
But they are gonna cause a lot of trouble while they run up to their limits, and they are already calling on kindred sprits to attack Americans .
I am not so worried that they will eventually succeed, but that they will kill a goodly number in their futile attempts.
Including anywhere that a Muslim might be , there is no particular thing that makes the US safe , we have a lot of Muslims that live here .
Most Muslims are probably smarter than the ones that think that extreme violence advances their cause, but how many does this small minority need to amount to, to cause a pretty bad problem?