In reply to Registered Independent.

All kinds of people have committed violent acts on US soil, and by far the majority have not been Muslims. Even setting aside all the personal acts of violence—angry husbands killing wives, depressed mothers killing children, disgruntled employees killing coworkers, bullied children killing fellow students—and only consider the politically motivated violence, there's still a lot: anti-abortion activists, anti-government militias, racially-motivated church bombers, etc.

We have rather extensive screening of potential refugees. In my estimate, people who have passed that screening are probably less likely to be a threat than some random guy on the street.

I'm generally not afraid of random guys on the street; I'm even less afraid of random refugees.