If you want to attack the phenomenon of whitewashing in art, go for it. If you think the best way to go about that is zero in on a single Twitter fan artist that doesn't even speak your language and know full well that it will lead to harassment of said artist, then you're a fucking lunatic.
No, a dude in Japan making a dark-skinned character a tiny bit lighter is not a big contributor to centuries of marginalization and stereotypical attitudes towards black people. It's a guy with an atypical choice of colors that actually likes the character.
There's just zero self-awareness with these people hurling harassment, especially after they nearly drove a SU artist to suicide. It blows my mind that Nepenthe is still a mod when she can be a contributor to that kind of culture even when that opinion is in the minority in that very thread.