I haven't met a vegan who didn't think they were more pure than others around them. Veganism is a religion where practitioners are the gods and get pretty testy when they are not worshiped by others for their superior culinary practices. It is the ultimate worship of the self and they tolerate no other gods meddling in their self-love.
The same sort of self-love informs the modern idea that remaining unmarried is the best state of being.
Forbidding to marry, and commanding to abstain from meats, which God hath created to be received with thanksgiving of them which believe and know the truth.
This may be the most basic attitude against God in the Western world right now - rejecting what the Lord has given for our use. We are meant to marry and bear children in marriage, which brings us closer to the state of God and our relationship to him.
Eating fruits and vegetables more than meats is actually a good thing, but "religiously" avoiding meat is setting up a false god that demands an abstinence from meat in the place of the true God of the Bible that never commanded such abstinence.
Later revelations from the Lord confirm his attitude about veganism:
18 And whoso forbiddeth to abstain from meats, that man should not eat the same, is not ordained of God;
19 For, behold, the beasts of the field and the fowls of the air, and that which cometh of the earth, is for the use of man for food and for raiment, and that he might have in abundance.
https://www.churchofjesuschrist.org/study/scriptures/dc-testament/dc/49?lang=eng&id=p18-p19#p18
Make sure that you actually obey God and don't set up bizarre counterfeits.