Polite & impoliteness are based on the individual cultural identity?

Question

Japanese:

I was once invited by one nice japanese family, and I spent my days in their apartment for 7 days. I dunno wanted to be a beast of burden for them and so I have given some special gifts for their mom, dad and the two friends of mine, before I left finally peacefully

the black dudes: the unknown came to my house cos they needed a money to lend. they wanted to pay the house rent, so I have lent them. I did not hope if they will pay me back, cos their family is a poor african asylumseeker. I was just glad to help others.

One day I asked one of their younger afroamerican brother who used to live in the states, what is he doing for a job in the states? he was suddenly becoming aggressive and he wanted to beat me up without any reason.

I just thought some people are very nice and polite like that japanese family members, while others are completely ungrateful and a loser cos they have a "Neanderthal behaviour".

polite & impoliteness are based on the individual cultural identity?

Answer 1

I have a problem with you classifying the Black people with "neanderthal behavior."  Their behavior isn't because they are Black.  Of course any person who's taken a human relations/culture class knows that Japanese people tend to be very accomodating to visitors.  Polite & impoliteness CAN be based on individual cultural identity but you should not think that all Blacks are "neanderthals."

Answer 2

I like your experience. some people are just uneducated primitive animals!

you better do not do it, what you´ve done in the past. it depends on someone you know well.

Answer 3

That has less to do with individual cultural identity and more to do with the individual...your black friend has issues and rage for whatever reason, best to ignore that and move on and avoid contact in the future, he is not your problem. You hit a nerve by mistake, again, not your problem.