Agnosticism is moreso just not asserting any belief as true, because you just aren't sure. It does not make an assertive claim of disbelief nor in belief. So I guess it's kind of like just saying "I don't give a stuff", although that's certainly not how I feel.
See my post:
Agnosticism isn't a religion. When you called yourself agnostic theist, all that means is that you're still Christian, but that you recognize your beliefs cannot be proven and you don't claim to know they're true. (If that's not accurate, then you find a more accurate term.) So that "pot kettle black" phrase is directed at the theist part.
Agnostic by itself doesn't mean anything; it's a modifier that your attach to theist or atheist. If someone asks "what do you believe" and you say "I can't know for sure" then sure, that's accurate, but you didn't answer the question. A more complete answer would be "i don't believe in anything, but i can't know for sure" (agnostic atheist)
Defining it the way you have (not asserting anything as true) is pointless because there's already a term for that: atheist. All atheist means is that you don't actively hold a belief in a deity. Any reason why, or anything else, is irrelevant.
The problem is the perception of difference, caused by the number of people whose entire argument against it depends on accusing atheists of claiming to know god doesn't exist, in order to label the position as unreasonable... but I've seen very few people actually claim to know so. People who say something like "Atheism is just an unreasonable as theism, your better off saying you don't know"... Except that (most) atheists don't claim to know. So what happens then? You get several page threads about " is Atheism a religion" where the atheists keep saying they don't claim to know god doesn't exist, and the self-proclaimed "intellectual/moral high ground" agnostics refuse to believe them, in order to keep their examples of differences so that they can continue their false distinction.
Another thing is theists trying to shift the burden of proof by calling Atheism an assertion
Calling yourself agnostic requires strawmanning the atheist position... because that position already covers you.
http://www.patheos.com/blogs/reasonadvocates/2013/10/03/youre-either-theist-or-a-theist-there-is-no-agnostic-3rd-option/
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