a genetic trait if you will
As you know, Brazil has a huge mongrel population. And we also have that typical degenerate, perverted and corrupt jewish culture deep rooted in the population and the collective mind. But when I was a kid, I remember there were two types of kids: the majority, that seemed like they had been born with that attitude, for they lived according to it so naturally, so skillfully, that it seemed like a skill genetically transmitted. While there were those few who had extreme difficulty to get used to it, and in most time got bullied/suffered in the hands of the mongrels for several years untill they learnt how to be like that, due to social pressure and personal defense in a way. Todas as adults its hard to spot what is natural and what was learnt, but as kids it was clear. And those few who had trouble initially emulating it, happened to be the ones with german/italian heritage, and a few portuguese. Now that I have racial knowledge, they are all white, or at least they are mostly white, in some cases.
EDIT: As a personal observation from my childhood experiences, poles and ukranians (they were not uncommon where I lived first) tended to be mean/tricky/shameless, not that I have something against them, my childhood best friend was a pole who kept setting me up, lol, but its an interesting fact).