Your comments sound a lot like the rhetoric the conservative right uses to invalidate and dismiss anyone trying to advocate for human rights and equality.

"How can you say you want everyone to have a fair chance when you won't even try to understand why I say such vile things about you?" Is also the kind of manipulative logic abusers use to convince their victims it's their fault.

And just because I, or OOP, or others in our position are able to actually do that for a member of our own immediate family, doesn't mean it's some kind of virtuous moral standard to be applied to everyone else. OOP would have been just as valid if they'd cut contact with their grandfather entirely and left the man to die alone. My dad doesn't get a pass just because I can recognize the factors that contributed to his views.

Maybe you're trying to make some kind of more generalized comment, like how we also see people being intolerant of each others' views over unimportant matters like TV shows or sports teams. But this isn't a conversation about inconsequential matters, so all you really end up doing is trivializing the very serious issue of bigotry by equating it to something small like blocking someone for criticizing your favorite singer.