That might be. But if you believe something, it does change the way you act. If it didn't, how do can anyone tell that you actually believe it? I was under the impression (for instance) that Christians were obliged to take the word of Jesus out into the world and save other peoples souls. It is a sin for them not to. So how exactly does that work with "not shoving it down other peoples throat"?
It's a perfectly reasonable proposition to believe in something without seeing fit to harm/kill somebody who doesn't believe the same thing.