I wonder why

Puzzle & Dragons x Nijisanji collab! When the news came out, it was on fire, and well, I understand the reason (the original reason), but I wonder why some veteran Touken Ranbu players are attacking VTubers... Due to various things, it's understandable if you dislike VTubers, but with this Nijisanji collab, the VTubers who learned about Touken Ranbu became interested, but because of some veteran players, they're a bit hesitant and turned off. As a Touken Ranbu player myself, I felt sad. I wish the veteran players would be a bit kinder to the VTubers who are collaborating, as they are also veteran Touken Ranbu players. Oh, by the way, I don't know Nijisanji myself 😅 (I'm learning about them from a friend).