What do I want you to do? I want you to stop trying to whitewash your history.
In the history of any society, there will be things that you can be proud of and things that you should be ashamed of. Don't pretend that the bad things didn't happen, or worse, rewrite the narrative so that slavery and genocide, some of the worst atrocities that one group of humans has ever inflicted upon another, somehow become a point of pride. You don't have to be "ashamed of your heritage," but you must acknowledge that your ancestors and their neighbors did some shitty things. Recognize that you, personally, benefit from many of these things; while other people, especially minorities and the poor, still suffer as a direct consequence of them. Finally, and this is the important part, stop blocking attempts to rectify this injustice.