To be fair, you're comparing the Holy Grail of all nations to America. I mean, they're nice to just about everyone, have had gay marriage legal for over a decade (I think), and have moose. Not a fair comparison to the… melting pot that is America.

Personally I do think we should let the refugees in and just do more extensive background checks that they do now since it has appeared to me the checks they do aren't that extensive and we're treating the Syrians much like the Jews back in WW2 when the exact same thing happened. Along with the Jews, Nazis, disguised as Jews, snuck into other countries to await Hitler's orders of attack. While it never occurred, it still was a threat. Why is this any different?