I can't enlighten you, because unreasonable is not up to me.
I can tell you that the terrorists are smart. If they know we're targeting a certain group, they'll use someone else, which is why profiling only goes so far. Does anybody honestly believe they won't use American citizens?
If they can't get in here, then that chance is remote.
All of you folks wriging your hands over "safety" should be marching on something to have the borders clamped off. Then you can be "safe" without having someone touch your cherry flavored K-Y to avail yourself of public transit.
And really, wouldn't that be preferable?