"I don't see anyone showing up at Catholic School Board meetings to tear up bibles and scream insults."

That's because you're probably not old enough to have witnessed them first hand.  It was the 60s through the 80s where most of the major battles to secularize government were fought in Canada and most provinces defunded their Catholic school boards. At this point in history, there's only ON, SK and AB left, and those three would LOVE to get rid of them but they've written support for a Catholic system right into their provincial incorporation documents. They pretty much have to let Catholicism wither, first.

If you think that didn't happen without acrimony, then I strongly suggest you read up on the Quiet Revolution in Quebec, which was anything but. The Catholic church was insinuated in government so heavily that it was almost a revolution to rip them out. It's no mistake that QC sees significant opposition to Islamic school prayer, religious clothing, etc.