I'm not apologizing for WWII atrocities (I'm not sorry)... is it ok to refuse to apologize?

I'll never apologize for what one of my war-mongers ancestors (great grandfather.. don't even know what his name was) did to other people's families long ago in WWII.

I'm fully aware of what happened but I'm not sorry at all. I'm not sorry because I didn't do anything. I'm not him and he's long dead already. Is my refusal to apologize normal? I don't feel I own any explanation at all.
I'm not apologizing for WWII atrocities (I'm not sorry)... is it ok to refuse to apologize?
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