You've made yourself clear that you're not interested in an honest debate, and I'm not interested in a dishonest one, so I'll leave you to have the last word, though I won't bother to read it.
I'm totally interested an honest discussion. Once you start being honest about how your framing of these things is part of America's historical structure of oppression, we can have one. But as long as you keep pretending without evidence that oppression miraculously ended in "in the 70s", "the 90s", or "roughly ten [...] years ago", we can't have an honest discussion.
We both agree America was founded with oppression built in. We both agree that it carried through until recently. You believe that those structures and attitudes totally ended at some hazy time by undescribed means, a time that just happens to be convenient for your argument. I don't. I believe it has continued, waxing and waning just as before.
Per Occam's Razor, you are making the claim that requires justification. The only reason you can act otherwise is that you hold one of the beliefs necessary to prop up oppression: that the current structure is perfectly fair. Suddenly, identity politics is not what white men have been doing in America since 1619. It's what those other people do. Without you ever catching on that your beef with those uppity other people is the same complaint that's been voiced at least since white people were fretting about slave rebellions.
So if you want honesty, get honest. Go take a class and learn the history. Maybe you'll discover some proof that oppression really did end the day before yesterday. But my bet is you'll realize that your claim is bunk.