"And of course Muslims are more of a threat than non-Muslims. How many acts of terrorism have been committed in the last 20 years by other immigrant groups? The Vietnamese? The Chinese? The Philippinos?"

And here is yet another example of your anti-Muslim bigotry. You ignore all threats but one: terrorism. And because a tiny fraction of Muslims world-wide are associated with terrorism, you describe Muslims in general as being more of a threat than non-Muslims. To use that rationale, Canada should deny entry to Americans, because they are far more likely to resort to violence than many other nationalities.

To my knowledge, no Muslim, Vietnamese or Chinese person has ever committed an act of terrorism in Canada. So on that particular threat there's nothing to compare them. But if you include all the threats that could arise from a group of people, some Vietnamese and Chinese immigrants are known to participate in violent gangs which have caused the deaths of innocent Canadians.