People don’t like to be made to feel uncomfortable (via preaching) about something they enjoy.
Fixed that for you.
Hate is a strong word, but as a meatatarian, passionate vegans don’t make me feel uncomfortable “with knowledge,”but some can be incredibly annoying with the way they go about voicing their opinions. It’s not because of the “truth hurts” or “truth is uncomfortable” angle that you’re smugly going for, but because some are like the Karens and SJW’s of the diet world.
And before I’m accused of generalizing vegans, note I said SOME. I also feel the same way about anyone else who is overly-passionate to the point of “my way or the highway.” Like some who are on keto. Yikes.