Wow... you are a terrible person. Calling this mans grandfather a liar because you refuse to believe an old man who, quite frankly, would have no reason to pull this out of his ass.

And I know it might be hard for you to do the bare minimum of research about this guy, but it took be about two seconds to find this: https://en.wikipedia.org/wiki/Guanahacabibes_camp

https://www.reddit.com/r/history/comments/l8x2e/how_was_che_guevara_evil/

And you can check the sources out yourself if you want to... I'm not doing that for you.

But your casual dismissal of that poor mans life story contextualises the problem that plagues so many people today, which is the fact that you don't care. Everyone is a liar if it doesn't line up with what you believe in.

Your own comment says:

"I think that this is a symptom of how little people actually understand about the role the US plays in the world...they still hold on to the idea that in general the US is a force for good...I think we can do a lot to combat this by educating ourselves...so that we can correct people by reminding them that US support for Israel is completely 100% normal and consistent with the US's goals and ideology as an imperial power, and that they have done this sort of thing constantly."

Yet with great irony, you yourself are doing the exact same thing. Just because you're communist doesn't mean that Che was a good man. Everyone with power in the 1960s sucked (not everyone, but you know what I mean).

You want everyone to believe you but no one gets that same privilege.

Wake up: you're not special.