"You said you are a secularist who values knowledge gained from critical thinking. Some critical thinkers have arrived at the conclusion that religion is essential to humankind. Are they allowed in your philosophy?"

Allowed? ALLOWED? (That's in answer to your capslock question).

What would be the point of denying the existence of people with a particular opinion, just because I don't agree with them?

"I have posted very un-Christian things a few times."

Everything I post is un-Christian, because I'm not a Christian. The world is not made up simply of Christian/un-Christian dichotomies, no matter how badly Christians wish the world were so.

Christianity isn't the global default, people.