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

That's a false claim. Students of any faith, or no faith, are accepted at TWU. No one is required to endorse TWU's religious views. All that students agree is to act according to the covenant. The covenant is a code of behavior, not a religious commandment.

I suggest you read the covenant here:

https://www8.twu.ca/studenthandbook/university-policies/community-covenant-agreement.html