You should read the post the vegan@lemmy.world mods made in response to the admin actions. Phrases like "carnist Lemmy admin", as if that's the reason they didn't like the idea of starving a cat.

There was also a comment saying Vegan should be a protected belief, like other religions.

It's not a conspiracy by the meat and dairy industry.

A carnist lemmy world instance admin has stepped in and meatsplained to the mods

It's difficult to take people like this seriously.