Montreal is not the fourth Century in the East, it is the 21st century in the West. That's a terrible analogy--by that logic I could prove anything I wanted, just draw a specious analogy with vastly alien historical situations to prove anything evil. After all, history is violent and nobody is innocent if you go back far enough and make ridiculous comparisons. What you are doing is akin to religious people who try to claim Atheism is evil by citing the massive amount of deaths in China. It's irrelevant.
You have to look at the reality that exists in the now. We've far, far more pressing social issues here than oh so scary Muslim families who are going to their mosques and working their day jobs.