Atheist extremism is bad... mkay?

[Edwardo Piet]

[...] If atheist extremism is not a problem now (and that's debatable), then it certainly has the potential to become one.

No it doesn't have such potential because that's impossible by definition. Atheism, as you know, is non-belief in God, and so you can't get "Extreme atheism" any more than you can get "Extreme non-stamp collecting".

If there are atheists who act like assholes, that doesn't represent atheism because that has nothing to do with atheism and so you shouldn't worry. They don't represent "us". There is no "us" other than the mere disbelief in God we share that makes us atheists by definition.