On the other hand, let me ask: Would you read a story concerning Boudica and her daughters, raped by the Romans? What about a witch-burning that named the real victim in 1512? What about the story of Jesus's crucifixion?
I have refrained from discussing my reservation about D/s fantasies involving real people in detail because I deemed it could be unrespectful to you or other readers of this remarkable story. But as you asked me to elaborate on my position, I'll try my best to explain it without being too judgemental about those who may have a different opinion upon this matter.
Let me first make it clear that I have no problem with stories that depict a cruel death or sexual abuse of a real person in itself because, as unfortunate as it is, it would be delusional to believe things like that can never happen in real life.
Nor I have any problem with fantasizing about a person who consented to become a 'victim' of sexual abuse. That's why I don't have any qualms about reading historical accounts of most sickening atrocities or participating in a degrading roleplay with other people in a community like this.
But when it comes to drawing enjoyment from death, suffering, or even just humiliation of a real person who doesn't have any intention of participating in such a fantasy, that's where I have to draw my lines.
If I happen to become a victim of such a cruel fate, for example, I certainly wouldn't want anyone to treat my agonizing torment before death as mere entertainment. And if I had a wife or a daughter, I would be upset if someone fantasizes about them getting raped or sexually harassed when they didn't give consent.
As such, if my imaginary wife or daughter was actually raped, tortured, or killed, and if some person openly treats that tragic event as if it was just a BDSM novel written to gratify his or her sexual desires, I would be beyond furious.
It won't matter for me if those people do such a thing before or after my death. I simply wouldn't want anyone to treat such personal tragedy of myself or my family as mere entertainment, now or hundreds of years later.
So to finally answer your question, it is "no". I wouldn't enjoy reading a sexualized account of a real person who was burned at the stake during the Inquisition period, for the reason I stated above. And I wouldn't enjoy a story depicting how Boudica's daughters got raped in front of their mother, if it was written to convey erotic excitement rather than historical accounts.
Time may heal the deepest wounds in our mind, but the right to forgive and forget such injustice lies in the victim alone, not in anyone who wants to consume such suffering for one's entertainment. So my reservation against such stories wouldn't be affected if the victim lived a few hundreds of years before my time.
I know that it's a fine line, and maybe it's also quite an arbitrary one. For example, I feel uncomfortable with such fantasies based on history but without real-life victims, but I nevertheless enjoy reading them.
If someone would press me for an answer, how it would be so essentially different indulging in a Nazi-sexploitation story, for example, from enjoying a similar fantasy about execution or torture of real person, probably I won't be able to give a clear answer.
However, most of us who have such dark fantasies as mine have to draw a line somewhere (e.g. child abuse), if we are to reconcile ourselves with our morality.
So, it's just that I have chosen this particular place to draw my lines, and that's why I generally try to be careful in judging others using the same standard, since it's essentially a personal one.