Do you think world would have been a better and friendlier place if we kept our political and religious beliefs to ourselves.?

Trumpeting out political and religious beliefs is almost never friendly. Talking about them and discussing them with others in a respectful manner might make the world a better place, but "my way or the highway" is a sure path to misery.

Amen

I think we'd be a lot less knowledgable, and just as unfriendly.