Using your logic we should therefore exonerate all people who only murder one person, since they are so much better than mass killers or serial murderers.
This is nonsense. We can only judge an historical person's actions and attitudes within the society they inhabited. It's one thing to say that a certain era or other historical span was violent or enlightened or oppressed women or whatever - that's pretty easy. You're comparing a whole era with the average of the current era.
You can't do that for individuals within those societies. Very simply, put Darwin or someone like him alongside the worst and nastiest of our current crop of racists in Western societies. He'd come out pretty well on that comparison. You can do the same for women's rights. There are a whole heap of women and men of decades or centuries ago who stood up for women's rights. But they did it
as they perceived them. Modern women and men would see them as stuffy, old-fashioned and prejudiced about the proper role and place of women. Despite being courageous, admirable people most of them would come out pretty badly by a modern comparison.
Sojourner Truth's famous "Ain't I a woman" speech contains notions about women's intellectual inferiority that would make modern people laugh (or squirm or spit with rage). But she's much admired for her standing up for women's rights. Especially working women.
'And ain't I a woman? Look at me! Look at my arm! (and she bared her right arm to the shoulder, showing her tremendous muscular power). I have ploughed, and planted, and gathered into barns, and no man could head me! And ain't I a woman? I could work as much and eat as much as a man – when I could get it – and bear de lash as well! And ain't I a woman? I have borne thirteen chilern, and seen 'em mos' all sold off to slavery, and when I cried out with my mother's grief, none but Jesus heard me! And ain't I a woman?"
"Den dey talks 'bout dis ting in de head; what dis dey call it?" ("Intellect," whispered someone near.) "Dat's it, honey. What's dat got to do wid womin's rights or nigger's rights? If my cup won't hold but a pint, and yourn holds a quart, wouldn't ye be mean not to let me have my little half-measure full?"
The whole speech is the "unexpurgated" version by Gage at
Ain't I a Woman? - Wikipedia, the free encyclopedia . The earlier published versions conveniently omitted the references to class/status/race generally and to slavery in particular and to her children being taken from her.