War Criminal
Grandpa was a serious Nazi German war criminal. He was always a racist a-hole as far as I can remember, though he died when I was about 12 years old so my memories of him are a little hazy by now (I am in my late thirties). He was friendly to the people around him as far as I remember, as long as these people were white and Christian.
And I am in a slightly weird situation, as my other grandfather was imprisoned in a Nazi work camp for being a socialist. And I am neither responsible for the Nazi grandpa’s evil deeds, nor can I claim any any of the good deeds the other grandfather did for myself.
The Nazi grandpa received the ultimate punishment though: His daughter (my mom) married a serious hippie and my mom got disowned for that. She made the right call though as my dad is really awesome.