Well, we all aren't one culture. The world has many different cultures and plenty of different ones in the same countries.
If you really don't understand that white Americans, African-Americans, Mexican-Americans, Muslim-Americans and Asian-Americans each have their own cultures with their respective norms and traditions, it's either obstinance or you've been living in a cabin in the woods.
Bottom line, it won't matter what anyone says, you have an agenda and I'm done wasting my thumbs and fingers on this conversation.