She was making all her money off videos about being a vegan. She deserved plenty of fish emojis for the deception. It wasn't about a diet change.

That might be true for a specific community of vegans that explicitly seek each other out (see sibling comment), but that's hardly relevant for considering whether to group them together with vegetarians when a comment applies to both of them on HN.

That's backlash against a fake youtube shill, not specifically about someone giving up a vegan diet.

Same reaction would occur for any vocal activist caught doing the antithesis of what they preach.

Most vegans will say "do whatever you have to do to live" and want a reduction in the consumption of animal products and harm of animals wherever possible. They will, for example, take vaccinations and medical treatments that have been derived from animal products if there are no alternatives.

So, if a person has honestly tried everything and they absolutely need to eat some meat and fish to be healthy, then most won't have an issue with it. There will always be crazy internet kooks though.