Also, I can pretty much guarantee that even if someone slipped through the cracks and committed an act of terrorism, the number of people killed as a result would almost certainly be less than the number of refugees who will die from us closing our doors to them - and yes, American lives and Syrian lives are of the same value.
The thing is, the American government exists to serve the interests of the former, not the latter. If even one American life is imperilled by refugee resettlement, it should be off the table.