Antitheism

[Excited Penguin]

You sound like an antitheist to me. But you identify however you wish, man. 

Point being every single atheist I've met in my life, including here, is an antitheist as well. I have yet to meet one who isn't - and that person would basically have to not object to religion or theism as a problematic set of ideas. Only babies are non-antitheist atheists. Everyone else is. It's just the reality of it.

Is there a word for a person who tells people what their position really is?

There are words - an intelligent person who is fluent in English.