"Students have to endorse TWU's evangelical religion to be admitted."

That's a false claim. I suggest you educate yourself about TWU before making others. Students of all faiths, or no faith, are accepted at Trinity Western. Students don't have to endorse TWU's Christianity, they simply agree- voluntarily- to follow TWU's covenant. The covenant requires no religious observation at all- it requires only that students behave in certain ways. It's a code of behavior, not a religious commandment. You should read it some time. It's not the evil manifest you think. 

If LSUC is basing its case on "it was within the rights and traditions of LSUC to refuse to accredit a law school that would require religious adherence as an additional entry criteria," it will go down in flames at the SCC.