My great-grandparent harmed your great-grandparent, and now I am convicted in response?

At the very least this sentence would appear to violate statute of limitations :-) But the bigger problem is that the punishment has no deterrent value--there is no way for me to change my great-grandparent's behavior. And it is straightforwardly unjust to convict me for a crime I didn't commit.

I think this is actually a pretty racist idea--that because you share genes with someone, you are partially responsible for crimes they've committed. It would be like if someone in a small town committed a crime, and the town responded by having the police begin always harassing every member of the criminal's race.

Your comment ignores the fact that oppression based on gender and race still exists today.

Alright... so my 3rd cousin twice removed did something to oppress your 4th cousin once removed, and that's your justification for abusing me on the basis of my gender/race?

What is being accomplished here?

Two wrongs don’t make a right and all that...

I prefer to subscribe to "punching up vs down..." as my simplified take