I dunno. I don't exactly go out of my way to buy Mein Kampf or incorporate it into my games. And he's been dead about the same amount of time.
It's not about boycotting though. It's about recognizing that
A) the Mythos and many of the mythos stories are grounded in some extreme racism.
B) using Mythos stories and elements from Mythos stories without examination is tantamount to approval of the message. Or, at the very least, gives the appearance of approval.
Given the mountain of fantasy fiction out there, I'm not sure we need to enshrine one of our most horrid examples of humanity as a source of material for the game. It's kind of like how they don't use Lovecraft's bust as a writing award anymore after handing one to a black author. Does make things kinda uncomfortable. "Yeah, Dave, I know the writer of this stuff I'm using in the game called you a sub-human stain on existence who should be murdered in your sleep, but, his ideas are just SOOOO cool." is a conversation I'd rather not have with my players. Or my children for that matter.