Sayfullo Saipov immigrated to the US legally in 2010.  Canada vets immigrants through the same rigorous system of highly trained interviews, checks and balances as the US.  Sayfullo Saipov was radicalized years after arriving in the US.  So were others like him (i.e. Boston Marathon bombers).  It simply is not safe to allow Muslims into our country regardless of how rigorous the vetting is. You cannot prevent them or their children from becoming radicalized by groups like ISIS after they become Canadian citizens. When a local Muslim immigrant gets radicalized and  mows down your children with a UPS truck or rips a bomb off at a concert and kills your children in Canada then will you think differently? All nationalities, and all cultures are welcome in Canada, but I say stop it before it happens - NO to immigration of any kind for ALL Muslims from any country period. Enough is enough!