[borroka]

> I think that's probably a natural tendency for any type of people...

I agree about the natural tendency, the call of the "tribe" (ethnic group, common language, etc.) is there for all kinds of people, more or less. But there is a difference, and I'm talking about frequency distributions of behaviors, not naive black and white: some groups of people are aware of these tendencies, and they act purposefully and conscientiously to counteract them; other groups, well, it's hard to tell whether they are aware of these tendencies or not, but what is certain is that they don't practice any countermeasure to a natural bias.

Now, for some ethnic groups or nations, it is quite forbidden to talk about any kind of "tribal" behavior that they exhibit. But if within Facebook or Google or Netflix or whatever there was a team led by a Bulgarian citizen with all Bulgarian members, some complaints about the oddity of the situation, I am sure, would be heard.