Well, they don’t allow Nazi groups either! Seriously, oh my god:

And while the Ontario Ministry of Education also thinks GSAs are pretty important too, the Halton Catholic District School Board (HCDSB) takes a different view.
The board feels the groups are harmful and has issued a ban on GSAs altogether.

“We don’t have Nazi groups either,” rationalizes board chair Alice Anne LeMay. “Gay-straight alliances are banned because they are not within the teachings of the Catholic Church.”

“If a gay student requests a gay-straight alliance they would be denied,” she says flatly.

“It’s not in accordance with the teachings of the church. If they wanted to have a club outside of school, fine, just not in school.”

Alice Anne LeMay should not be charged with overseeing anything where children are involved.

Dan Savage points out the obvious:

The Catholic Church, of course, has demonstrated a willingness to work with Nazi groups in the past.