I am totally willing to be judged wrong by future generations.
We won’t have a choice. Short of ensuring there will be no future generations to judge us.
For example, I frequently think that my willingness to eat factory slaughterhouse meat (or meat of any kind) might be broadly considered monstrous in some future. Many people consider it monstrous now. I know I might be wrong to do so.
Good example. Another being the use of fossil fuels and the destruction of the environment.
Anyway, if judging people of the past is presentism and wrong, I don't want to be right.
Judging people of the past
by today’s standards is presentism. As the poster above mentioned, it’s not the job of the historian (even amateurs) to bias history. Presentism is bias.
I am pretty sure that if you asked people in Jefferson's time, if raping the 14-year old unrecognized half-sister of his wife they'd know it was wrong, except many didn't see her as a person. You may not want to judge that, but I have no issue with it, but do have an issue with those that won't.
The problem is assuming we’re right without acknowledging the possibility of being wrong. Ignoring that morals change over time. Pretending there’s no bias inherent in that. Our morals are a product of our time, they’re not special in any way. Again, we will inevitably be viewed as just as monstrous as Jefferson. Or, morality will swing darker. And those in that present will judge us by their standards. There’s no objective morality to point to so pretending as if there were is a terrible idea.
I have no problem saying rape, slavery, and racism is wrong. And I’d be happy to be judged for that. But we could all use a bit of humility and maybe slow down on the stupid assumption that our views are somehow morally superior when they just as trash as any other time. Just trash in different ways. Gain ground here, lose ground there.
Harming people is always wrong in every time. That is not complicated.
It’s far more complicated that you’re presenting.
For example, is it wrong to harm someone to prevent them from harming you or your loved ones? According to your simplistic statement of morality, yes, it’s wrong to protect yourself and your loved ones. But what are the chances of you
not stepping in and inflicting harm to prevent someone from hurting you or a loved one? Zero? One in a million?
Or is it wrong to inflict harm in protecting strangers from harm? Again, your simplistic statement of morality says, yes, it’s wrong.
Good thing the Allies disagreed with you or the world would be speaking German. There are certain times when violence is not only justified but necessary, unfortunately.