All the more reason to restrict their movements in the US. Who is better equipped to do that, the American people or the government.
I think we should be given the authority to refuse service to Muslims or anyone we don't trust. We should be allowed to put whatever conditions we want on our dealings with these people. Flight schools should be allowed to refuse to train them. Motels and hotels should be allowed to turn them away. Truck rental companies should be allowed to flip them the bird.
What if they're American muslims?
IMO, this is a war against civilizations where there can only be one winner. Islam is a cult in my eyes. A death cult.