> Because you're probably come from a high trust culture where you've been taught reciprocal trust...

That is just a long sentence for "us" vs "those people".

Having said that I don't entirely deny the effect of society on people's behavior. But at the same time, I have seen people from so called high-trust society being all polished and nice on the surface while being assholes and people from so called low-trust society being genuinely decent people despite not having the right name or the surface polish.

Also, assholes tend to attract assholes and people of the same tribe/clan/race tend to form groups.