Sorry, but you're incorrect. Agnosticism is the belief that one cannot prove a god does or doesn't exist. Or from the dictionary, an agnostic is "a person who believes that nothing is known or can be known of the existence or nature of God or of anything beyond material phenomena; a person who claims neither faith nor disbelief in God.". Look it up.
Atheism is simply a lack of belief in god/belief there is no god. Same difference. Atheism has no requirement for faith. As an atheist, I am not making any belief claim and so how would I possibly need any faith?
its not the same at all. one is a belief that god does not exist, this requires faith because there is no evidence to support god not existing.
Agnosticism is like I said before I like you've said above not having a position on it because you beleive it is not possible to know. (or in some peoples cases, they just don't care)
Atheism isn't "anti-religion" at all. Some atheists may be anti-religion, some others may not care less about religion.
I didn't say it was, I said Stalin was, and that was because of his atheistic views.

