On topic of refugees... no matter how good is screening process some bad individuals will slip into the country. They may not be terrorists but they can commit other crimes like this for example:
https://globalnews.ca/news/3235690/...ual-assaults-at-west-edmonton-mall-waterpark/
"Soleiman Hajj Soleiman, a Syrian refugee and father of six, has since been charged with six counts of sexual assault and six counts of sexual interference".
It is tough choice for numerous governments - you want to help decent people fleeing the war ravaged country but you need to protect your own citizens as well. How to do it properly? I think it would be better if more Islamic countries would help and accept refugees from Syria for example. Why Saudi Arabia, Qatar and other rich Arab countries are not accepting them in larger numbers? Certainly it would be way easier to integrate them than for most Western countries due to language and cultural differences.