So not to talk about religion, but I was at coffee a minute ago in my building and overheard some young, overly confident dude in a suit debating at (rather than with) some colleagues. They didn't really seem to care.
He was going on and on about how the Catholic Church is the true church and Catholics are the chosen people, how so many wars have been fought against the Catholic Church, how all atheists are smug assholes, and how the church has never, ever made a mistake in dogma. Of course, it's hard to say somebody else is smug when you just said your religion is correct and has never made a mistake.
And I'm kicking myself that I didn't ask what about that whole thing where the Earth is the center of the universe and Galileo was convicted of heresy for saying otherwise? Maybe you could make the argument that it wasn't officially dogma, but I mean, close enough.