People think Atheists are assholes for criticising religion because society has made it taboo to criticise religion. Which is unfortunate, because:

A) there's no good reason why religion should be given special privilege. Religion is the only part of a person's world view you can't criticise, satirise, or mock. Politics? You can discuss it all day, and criticise a person's political views and no one will call you a jerk. Nashville fans are free to mock my Red Wings and I nobody will call them a jerk. But then for some reason religion is off limits.

B) If we can't criticise religion we're telling ourselves faith is a good enough reason to believe in something. This will just make it difficult for us when we encounter groups or people who say "my faith tells me we should kill people". Because it's so taboo to criticise faith we then start to blame things that are not responsible for atrocities that were committed in the name of religion. Either that or we ignore the issue completely.

There are many people who think that the terrorists in the Middle East are acting the way they do because of political factors, or socio-economic factors, and of course neither are responsible.

Look at the 9/11 hijackers. They were wealthy and were educated in western universities; and if what they were doing was politically motivated because of occupation by foreign forces, we should be seeing Buddhist monks who suicide bomb Chinese government buildings.

We don't see monks blowing themselves up though because in Buddhism using violence isn't a part of their beliefs. In Monotheism, it is. These terrorist, the people who shoot up abortion clinics and the other religious crazies have spent large amounts of time talking to religious leaders, and studying religious texts to come to the conclusion that what they would do would be supported by a divine being.

So feel free to criticize /r/atheism for being hostile towards religion, but just know, if you do you're contributing problems we see on a global scale.