There's also Avdol from JoJo, who's voiced by Chris Tergliafera (a white guy) in the English dub. A white guy voicing a black character isn't the problem. The voice actor being a racist, transphobic, antisemitic asshole is the problem.
Personally I think it is.
I spoke about this with my friend before in regards to Apu in The Simpson's, I think in that instance, because the voice actor is doing a wide range of characters voices, it's acceptable, especially since writers can add characters in at a later date and want to keep the same voice actors.
However, if you are hiring for a specific role, why would you ever choose a white person to voice a black character when there are so many talented black voice actors?
It makes zero sense whatsoever. Even worse in this instance however considering the guys views.