Why does the right wing like to ignore the history of American Slavery?

I’ve been having discussions on the new SCOTUS pick and affirmative action. And right wingers bring up literally everything in order to deviate from slavery and civil rights history.

“It was the Africans who sold the slaves…so there.”
“My ancestors came here with nothing!”

Yeah none of that is relevant.
Why does the right wing like to ignore the history of American Slavery?
Why does the right wing like to ignore the history of American Slavery?
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