Now, regarding the topic of this thread...do atheists pick on others?
Yes, some atheists can certainly be combative, I have been guilty of this more than once.
On the flip side, after simply stating I am an atheist when the subject of theism comes up, I have been called an agent of Satan, a hater of God, unpatriotic, told I should leave this country, and so after hearing these things on multiple occasions for years, it is natural for an atheist to become somewhat combative and defensive. What I need to keep in mind, is that most theists are not like this, and not fall victim to the kind of selective memory we are all capable of.
I think an equally valid question is: Are atheists picked on by others? Not that two wrongs make a right mind you, just trying to shed a little light on the mindset of an atheist in a predominantly theist society.