From this discussion.
But I think New Atheist fundamentalism, and that is really what it is, really think there is a brave new godless world out there to be had if we just dump enough ridicule on religious believers.
Sheahen: You've said that baptizing a child or saying "this is a Jewish child"—that is, pasting a religious label on a child—is child abuse. In your letter to daughter, you ask her to examine what she's told based on evidence. What do you hope the world would be like if all children were raised without religion, according to your theories?
Dawkins: It would be paradise on earth. What I hope for is a world ruled by enlightened rationality, which does not mean something dull, but something of high artistic value. I just wish there were the slightest chance of it ever happening.
I'm sure Dawkins didn't mean it literally, but I think this explains some of the atheistic fanaticism out there.
People out there really believe that we can make this world a better place for everyone by getting rid of theistic belief. That is why some of them are dissatisfied with the normal methods of honest argumentation, the principle of charity, etc. when engaging in discussion with believers. Consider this diatribe aimed at you.
In order for religious believers to engage in atrocities, they have to think the religious end they want to pursue justifies the means. A good case can be made that the use of power on behalf of Christianity isn't appropriate,although Christians in history have not bought these arguments. Marx's version of the secular paradise isn't the only one out there, by any stretch of the imagination.
The antidote to ideological violence is a willingness to accept, and accept only, those means of persuasion made available by a free and open society. This is possible for religious believers and religious unbelievers. The idea that you can save the world from ideological violence by spreading unbelief as opposed to belief is, in my view, delusional.