And how do you propose we find all the muslims in the US? If they are willing to lie for their war, how do you know what their beliefs are? And how do you keep someone from converting?
You learn what their beliefs are by reading what they say to each other. Try it, and your foolish, naive efforts to protect those who would kill you, rape your wife, and enslave your children will be apparent as the cowardly behavior it is. You might wait until the knife is at your throat before believing the truth, but those of us who actually do know what Islam is and believes aren't going to sit still and wait to die.