Why? Because our country was founded by puritan Christians over two-hundred years ago, and they've done quite a job at trying to preserve their values over that time. They were always uptight about sex, but not about making war, which is why violence is no big deal to them. I am American but I know it doesn't make any sense at all. But I live in a country with a lot of people who never really think logically about the things they believe, they are too socialized into our society's ways of seeing the world to ever really examine the reasons why things came to be this way. Anything, no matter how bizarre, can seem completely normal if you've grown up with it always being that way. And that goes for all cultures the world over.