Yea. About the only thing sad about this.

Like, they are still kids, Charlie might have been a bigoted fascist but that's far too complicated for children to fully understand; to them, he was just "Dad".

It is truly unfortunate for them they had the ill fate of being born to such a horrible person, but that horrid person was spreading rhetoric which has resulted in countless other children losing parents themselves. All I can hope is that those kids grow up to understand this.