A condescending tone makes me an equal problem to a tax free criminal organization that wants to destroy education. Gotcha. I won't apologize for the tone, and if you really find it such an obstacle that I speak down to idiots who refuse to take part in a fair and productive discourse (Young Earth Creationists, Demonologists and the like) then I'd say you have not only a very thin skin, but an unrealistic expectation of these kinds of people to debate on equal ground.
As for dividing Atheists, correct, you cannot divide them on the core question of God. However, there are topics that many, many Atheists find themselves involved in. It's hard to be actively interested in topics like Religion and politics and not find yourself having some kind of opinions in things like sexism. So many Atheists have overlapping social/political interests.
Over the last year or so, feminism has been one of those topics. It's been incredibly divisive because of how groups like Skepchick and Atheism+ have worded themselves, making it sound as if not prescribing to their views on the issue makes you a rape apologist. It's been fun to watch at times, but it is starting to grate on me, since it's poisoning the conventions as well, which are extremely important right now with trying to legitimize Atheism as a political/social movement.
