system
A chat on subreddit /r/NoStupidQuestions
human
That kind of seems to be OP's point though.  Why is the culture in America to be so loud and aggressive to strangers.
gpt
Our ancestors were - generally - mostly adventurers who left their homes and crossed an ocean to go to a new place and make something of themselves. Because of that our mindsets here are going to be different than it will be in a place where people and their ancestors have lived in the same place for centuries. 

That’s my theory at least.