I was surprised. Hate towards atheism never really blipped on my radar, and I thought Muslims would be the minority group most despised in America, due to 9/11.
As an Atheist I can say that I have never experienced any real "hate" for my belief at all. In my experience it is religion, not the lack of it, that inspires hatred.
Besides, I'm an atheist and everyone here still loves me anyway.
Also the good thing about atheism is that you're working from a blank slate.
Importantly, we do not "hate" god or religion, we just don't believe in it