You still need to make sure that your comparison is apt. More often than not, comparisons to Nazis and the like are hyperbole, or at least sound like it. It's

You still need to make sure that your comparison is apt. More often than not, comparisons to Nazis and the like are hyperbole, or at least sound like it. It's also not silly to bring up Hitler, Stalin and Mao when somebody claims that religion is the source of all oppression. They clearly demonstrate that atheistic worldviews can be radical and dangerous, too. True, but be careful about how you use this. I've had people claim that Nazism, Communism, et al, were forms of religion themselves, which is true, depending on how you use the term.