Then Catholics in Canada should be exempt from taxes which they pay with the expectation that their government exists for their benefit.
Not sure what exactly you mean.
I do not beleive churches should be tax exempt.
Tax exemptions lead to the government telling you what you can and can not say.
If any church accepts money from the government as a supplement, the government can tell them what they can and can not say.
Catholic schools are private schools, they should teach according to their beliefs without the government interfering, that’s why there is a fee to attend the school.
It is Canada and the government there has been dictating thought for a very long time.