The joke was that atheists (along with the others listed) are inclined towards outspoken rants at everyone. You responded with an outspoken rant to the joke.

A) the joke was that atheists are exhibitionists, not that they are ranters. BAD joke.

B) In case the joke was meant to include ranters, the same case can be made that religious people are generally more ranting inclined. BAD joke.

C) I do not say anywhere that I (the ranter) am an atheist, which makes the whole point moot