So, it is an "insidious strand" of "anti-Islam prejudice" that leads Canadians to have "an obsession with Muslim women’s face covers" and an attendant "patriarchal impulse" to want to have face covers not be a part of Canada.

Um, no. 

I think there is diversity among Muslims and among Muslim-majority nations, just as there is diversity among Christians and Christian-majority nations.

What do I mean? Plenty of Canadians object to the anti-condom and anti-abortion and (males-only straights-only) leadership trends with conservative churches, and would like to see those trends fade away. That is, they prefer more liberal approaches of some United and Presbyterian Churches.  

Do all those objecting Canadians have "anti-Christian prejudice"? No. They have cultural preferences. Are they guilty of "racializing"? Again, I don't think so, religion is not race. 

Many overseas Muslims and Muslim countries are okay showing faces. It is not racist or hateful if Canadians favour that approach.