Nobody should be ashamed of the history of their people. That encourages some to hide from it. Instead one should not shy away, but try to study and learn from the mistakes of their forebears, so their children might get a better world someday.
Shame for something you yourself have not done, though? Pointless.
That’s a troll, fyi, I’ve run into him a couple times now. If you drive him into a corner he’ll just start name-calling and block you, so you can’t debate him in the future. He does not seem to realize this does not prevent us from leaving our own replies to his posts for everyone else to discuss, without him.