How are you going to tell the difference until it's too late. What do you want to do about them?
ConservativegreatGrandma wrote: "What do you want to do about them (Muslims)?"
It depends. For Muslim citizens who are not guilty of actual crimes such as supporting terrorists--not a thing. For citizens who are guilty of crimes--incarceration. For non-citizen Muslims who are here illegally, incarceration and deportation. For non-citizen Muslims who are here legally, profiling and efficient human intelligence to identify and remove violent ones. Bottom line: if they aren't guilty of crimes, I don't have a problem with Muslims, and I'm certainly not ready to shred the Constitution to punish an entire religion for the actions of some of their members.