I recently had a discussion with a student who majored in Political science and very much into environmentalism. We had lunch together, and he started to talk about Dawkins, which he liked so much. He shared Dawkins view, that religion caused so many troubles in the world and needs to be put away. Then, I asked him what religion caused the three biggest war of all that killed the most people: WWI, WWII, and cold war. He couldn't answer, so I told him: it was the clashes of non-religion philosophies such as nationalism, fascism, communism, capitalism, etc. I also said the latest version non-religion philosophy that will create conflict in the near future: environmentalism.
Needless to say, he never said hi to me anymore.