Antitheism

[Excited Penguin]

That's incorrect. Antitheist describes a person who subscribes to antitheism, not someone who is anti people who believe in God. It's a misconception on your part, and it's understandable, but please admit it.

What is the belief of god held by? People. So how then are you not Anti-people who believe in God(s), while being anti-belief in God(s)? It makes perfect sense.

And you would say;
"Yes, but just because I am against the belief does not mean that I am against the people who believe it".

Well, isn't that in direct parallel to what others have pointed out isn't the same thing, being Atheism, and Anti-Theism?

You see, when we apply your own logic to the situation you claim as accurate, we get an overwhelming sense of hypocrisy. 

Tell me, would it not be the same logic as the response I assume you would provide, that "Just because a person is against the validity of a belief, does not mean that person is against the belief"?

Just to be clear. I'm not claiming Atheism presupposes Antitheism, at least not by default. However, I am saying that it does, on average, presuppose it as an afterthought, if you wish. That is to say one can conceivably be an atheist without also being an antitheist, but that can only be for three reasons : one is either ignorant of theistic beliefs, totally apathetic towards them, or in support of them.