When you're quite literally erasing James Webb from the name, that seems like erasing and supports olivermark's point entirely.
History isn't about who has their names on objects, that's just window dressing. Taking his name off an object when it was put there to honor him is clearly not that same as erasing his history.
Asking people to forget his bigotry would be erasing everything but his name. Removing his name from the project is a potential result of a more complete knowledge of history, pending this investigation.