I think the more recent post on What Christianity SE is and isn't is a very useful resource.
I've come to understand what is and isn't acceptable in a way that can be expressed in two images.
In one, I picture a seeker, maybe coming to their Pastor or Priest, or maybe climbing a mountain to ask a guru the secret of life, or hoping the heavens will open up and divinely reveal absolute truth.
In the second picture, I see a giant person peering into a box with a magnifying glass, viewing all the little Christians running around with their various beliefs, saying "Oh, hey, look at this. That bunch over there believes in predestination while these ones over here don't. I wonder why that is? Hey, little guy: Why doesn't your group believe in predestination?" The little guy answers, and maybe triggers another little guy to ask a question of another, and sooner or later, all understand each other just a little bit better.
This site is more like that second picture.