Syrian refugees aren't a threat. Less than five out of eight hundred thousand refugees admitted to the United States since 2001 have been charged with a crime. Refugee status is the most strenuous of all immigration statuses. In fact, it is much more difficult to receive refugee status than protection under asylum status.
And why Syrians? Why not Belgians too by that twisted illogic?
Don't expect ignorant bigots to make such distinctions.