Not all religious, there is the nature element as well plus your country's past history and our (western) culture.
Grounding in God or humanism, it's all relative. You're operating under the cultural fallacy that everyone thinks like you and anyone who doesn't is a backward hottentot or fuzzywuzzy. They don't think like you, don't have your cultural references, don't begin to understand your thought process. And I'm not talking people in far away places either, people who think like that are your neighbors. One of the most astonishing things people learn in life is that not everyone is as reasonable as I am. If you cannot understand that people are just as certain they're reasonable and right as you are, then you're not respecting them and that's dangerous. Never underestimate your adversary, always place yourself in their position. That's how you understand them and then use that information, inducted or deducted, to persuade your adversary of the truthfulness of your position.
How do you prove you're right to someone who won't even let you speak? How do they confront your ideas and beliefs and how do you defend them when you censor? You can't.
Well fortunately for them it is easier to think about what effect their beliefs have on others and seek to better themselves than it is for me to turn str8 or a black guy to try chinese for a new look. Sympathy = none.
Is it? You're not living under a government installed and kept in place by a western power. You're not living in a place with inestimable wealth where the great majority of people don't see a penny of it. You're not seeing people disappeared into the back of black marias in the night. You're not seeing the vast wealth of the west where everyone lives care-free on streets paved with gold. You're not seeing an imperialist war fought in your back yard. You're not seeing a millenias-old culture being marginalized by people like Ronald McDonald, Madonna, and Lady GaGa. You're not absolutely perfectly unquestionably certain that there is a God and one right way to worship him.
You're very certain that rationality, humanism, scientific process, and individual rights are what are inherently superior to anything else. Your education, society, media, and culture all work to reinforce those values just as surely as the other guy's does for him and yet you're both very certain that your way is better.
This is how shit starts.
The only way to dispel that shit is to allow the free exchange of ideas in a dialog based upon mutual respect.