system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Why is Voldemort’s name a taboo but not Grinderwald’s? Aren’t their crimes roughly the same?
gpt
Grindlewald's aims and ambitions were quite mundane, just grand in scale. He wanted Wizards to rule over Muggles, and that was pretty much it. Any violence against other Wizards  was in a simple "if you're not with me, you're against me" sensibility. He was defeated in a rather specular duel, but a duel none the less, and imprison for over 50 years where he was no threat at all.

Voldemort was far more extreme. He didn't just want to rule over muggles but desired their extermination, and extended that to his felly non-pure-blood wizards. His tactics delved into far darker and taboo magic than Grindlewald ever did. Where Grindlewald established a following through genuine Charisma Voldmort could only ever rule through fear.

Voldemort also turned the Wizarding community in upon itself and exploited many of its weaknesses, such as its treatment of non-humans (giants, werewolves) as second-class citizens. People even feared the goblins would turn to his side.

But perhaps most importantly, is that his "death" was ambiguous and recent. Only 11 years (at the start of the series) compared to Grindlevald's 40 (at the start). Simply not enough time has passed for people to get over what he had done.