The fact that no Syrians were involved does not mean they do not pose a problem - just that they may not pose this problem.
The idea is to correctly diagnose the threads in the problem. Obviously it depends on what the particular argument is, but if it's that Syrian refugees pose an immediate criminal risk then it's not evidenced and at the very least we can hope there is time and room to work on averting it coming about.

I have never seen an unmarried woman under the age of 30 use the title "Ms".
It's almost universal here.