Criminals might be screened by other means such as by criminal record checks.

I would NOT answer yes to these questions:

-Do you think that people should have their civil rights restricted on the basis of their religion?
-Do you think that religious belief should be grounds for deportation?

I think people have a right to hold erroneous beliefs, so long as they don't try to indoctrinate others as if it were the truth. And I would not refuse immigrants on the basis of agnostic religious beliefs. But there are plenty of reasons, and situations, where devout religious belief would cause conflict. These are the ones I would reject. I think if a person was allowed into Canada, afterward becoming devoutly religious for some reason, they are going to have problems even without any legal interference. These problems arise from potentially erroneous beliefs, and I think they need to be made aware of that fact. If they were originally agnostic, they might be convinced to give up their devout or extremist views once again. In fact, it would probably only require access to information that contradicts their beliefs to do it.