First of all, Mafia, I don't believe that ALL atheists, or necessarily even most atheists, do tell / believe lies about Christians / the religious. However, some of the commonly repeated falsehoods include (in the following, "most" means "large majority," not its usual, "majority"):
1) All/most believers are anti-science. (See, e.g., this thread).
2) All/most believers are dumb hicks.
3) All/most believers reject reason in holding their religious beliefs. (This one is slightly subtle. Religious believers speak of faith, but it is the unbeliever who is likely to insist, along with _some_ believers, that faith does not entail reason).
I could probably come up with more if you want. This is off the top of my head. I'll keep posting back with additional ones if you want, but on the other hand, probably no point flogging it.
And, as Draugnar says, if you want more, just look to Putin.
@PE,
"Because any one person is representative of an entire group. Mafia didn't say "Putin," he said "atheists.""
"Perhaps you should read the thread. semck stated:"
Perhaps, PE, it is YOU who should read the thread, or even your own quoted words. As already noted, I did not claim anything about ALL atheists, just many, so Draug's reference to putin was a perfectly valid example of the kind of thing I am talking about.