I meet the alleged definition of "atheist". I don't believe in any deity.
Yet Atheists (with a capital 'A') really piss me off. And yes, apparently I piss them off too.
This is the problem. There are lots of people who are atheists (with a little 'a') who respect the role of religion in public and social life. I personally have no problem with "In God We Trust" being on money or with prayers in public institutions where it is meaningful to a community.
The real problem is when organizations that label themselves as "Atheist" organizations come with a a laundry list of social causes from same-sex marriage to eliminating religion from public institutions.
If Atheists are going to organize campaigns to remove religion from public life or change society in ways they feel benefits a godless life, then they need to stop the pretext that Atheists have no beliefs or no creeds.
If Atheists are going to band together to go on public crusades, they can't define themselves as only "people who don't believe in god".
Because lots of us who don't believe in god think they are full of crap.