And what is that supposed to do exactly? You think that terrorists are only refugees? Why do you think so many terrorist attacks are home grown? What could be causing that? A lot of these people are supposed to be our neighbors, co workers, etc. What would cause them to become radicalized? You might find the answer in many cases to be a bit ironic with rhetoric like "we should ban all refugees" or "muslim ban". 

When a lot of youth in Europe were asked why they wanted to go join ISIS a common response was "people already thought I was a terrorist" or "at least they would accept me". 

So no, banning refugees isn't going to stop terrorism, it's just going to play into the terrorists narrative that the west is at war with Islam and that muslims don't have a place in western society. It's fanning the flames. We need inclusion, education, and a sane foreign policy. 

Even in Eugene we had someone threatening people outside of a mosque. Imagine the impression that leaves.