I am not opposed to more controls, but we don't live alone in this world. The world would have to cooperate and so far we have done nothing but piss the world off. UK, France, Italy, Germany and other European countries have large numbers of Muslims (in part brough there by our pressure to create a "multiethinic" society like ours -- a philosophy that has its roots elsewhere, but that's another subject), so they won't go along with that. And with all the Muslims in the world surrounding us in our Fortress, what will that do? We can't "go it alone." That's the kind of thining that got us into this mess to begin with.
Also, you can't outlaw a religion! Christianity was outlawed and persecuted for 300 years and all it did was grow and grow until it finally took over.