> Oppression would be quite impossible throughout history if people weren't willing to oppress their own kind to the benefit of others.

No what's far more common is that people change their perception (or have different perceptions) of who is "their own kind."

You can actually see this happening in real time in the US with the emerging concept of "Heritage Americans." It's a way for losers and crybabies to narrow the scope of who is "their own kind" without having to openly declare that they simply don't love their countrymen.

I - and thankfully, it appears, the current administration - don't accept your definition of who is "my countrymen".

> losers and crybabies

Luckily, for now, at least, it appears to be your side that is losing and crying.

QED

> Oppression would be quite impossible throughout history if people weren't willing to oppress their own kind to the benefit of others.

Isn't the opposite far more common? When oppression happens, it is typically people oppressing the out-group for the benefit of the in-group.

My impression is that the foreign/out group delegate the actual oppressing to local representatives, who are more than eager to do it towards their own kind.