> Buuuuut he was a slave-owner

You say this mockingly, as if being a slave owner should not overshadow everything else you do in life.

Yes, it should. It absolutely should. Being a slave-owner is massively, grotesquely evil. It should be what you are remembered and rightly denounced for.

> Particularly when you use today's more sensitive moral yardstick to measure yesterday's actions!

Considering slave-owning to be morally wrong is not a modern invention. It was considered wrong at the time too, just not by those who were profiting off it.

For instance, I don't think you'd find many slave who did not think it was evil.