In a nutshell, everyone is oppressed, in some way.

You can be oppressed and be an oppressor. There's something to be said for how and why, but weighing them against each other is nebulous. This has been true throughout history. re: israel-palestinian, hmong-vienamese, english-scottish, etc.

> If you are not the oppressed, you cannot objectively be part of the discussion about _whether or not_ ...

I don't find this assertion is sound. There's an element of ideology in there, which I appreciate, but I do not agree on this practical tenet. If it was rephrased or attenuated to a more specific decisioning system (ie the latter part of the statement, is more palatable, albeit also something I don't fully agree to), I would re-examine it.

Genuine question, where have you sourced this line of reasoning from?

Look up the concept of "natural slavery".

Not cool. We've banned this account.

So, just because some men had a crappy idea — at the same time people also thought the earth was made in a week — every white man who ever lives is now precluded from an opinion. Dear lord.