There are several groups of athiests. One group hates the idea of God and all it represents. They believe that religion has done more harm to man than virtually any other system or group, and want it irradicated. These act hatefully because the religious are either the enemy and actively trying to subvert mankind, or because you are ignorant pawns and they want to wake you up.
Another group believes that God does not exist. Note, "BELIEVES". This is a belief system for them, not based on science, though they may say otherwise. They say that since there is no proof, God does not exist and the belief in him is damaging. Well, science does not proof, and cannot yet prove that God does not exist, and the vast majority of scientists know that science has little to do with proving or disproving God. You can't disprove God unless you have been everywhere and tested everything. Same for unicorns. They might exist SOMEhwere. These are hateful because you are a competing religion.
Then there are those who just don't want to deal with the idea and don't want to discuss it. My father as an example. He watched a plane strafe his submarine when almost all the crew was on deck. After the attack, you couldn't walk from one end to the other and not step on a bullet mark. They were everywhere.
One person died. The one kid they all admired, who never caroused with the guys on shore leave, the kid who wanted to go home and become a minister.
One bullet; middle of the head.
No one else on the ship had a single wound. Look it up. It got written up in "Stars and Stripes" (I believe that's the name). The ship was the Queenfish.
Enough to shake your faith, huh? At the same time, he returned to the Catholic Church latter in life.
Myself? I love all belief systems (even if I see the dangers of some). I wish everyone could learn about all of them.
I'm glad the atheists speak up here, as it is the best forum for their belief system, as well as the best place to combat religion, that they'll find in Yahoo! Answers. I'm also glad you speak up, the Christians speak up, Islamic people speak up, etc.
The principles of the United States, the idea of free speech, is reaching out to the rest of the world. Soon, everyone will have it.
What a wonderful world!
(Oh, just a note, dear. It also means that people who name-call and act destructively won't be able to do it without you and others calling them on it as well, and there are a lot more sane people out there than the mean crazy ones!)
Keep seeking the truth, folks! Keep speaking up!