As a historian, maybe you shouldn’t give John Adams too much credit for doing nothing. He was part of multiple compromises that allowed enslavement to flourish. While he is widely credited for not personally owning slaves, at least one found her way onto his kitchen staff and when he moved into the President’s House (later aptly named the White House), slaves were still finishing the exterior and grounds. Hemingway was a well-known anti-semite; this isn’t derived from his characters but from his personal letters. I’m not saying there aren’t good white people, or that there weren’t any throughout history. I often credit John Jay, a slave owner, for doing better than most of his era.

As far as blaming living people for things they didn’t do, I’d like to think I don’t but perhaps you can provide an example? While many white people benefit today from what was done to minorities in the past. VA and FHA Loans for example are often credited for the creation of the middle class and for decades were denied to Black people.

Historians don’t have a perfect record of truth-telling. I’ve written about Jenny Bourne who cites “natural increase” for the high birth rate of enslaved people instead of the accurate telling of forced breeding and rape. Edwin Betts covered up the beatings of teen boys at Thomas Jefferson’s Monticello. He discovered a letter documenting the beatings and hid it lest the Jefferson name be tarnished. I’m not saying all historians lie, they may simply be passing along what they’ve been taught.

If you have a better record of white people to tell, I’d love to hear it. You would need better examples though than the ones you mentioned.