Was going to high-school in Sweden for a bit. They got free lunch over there as part of going to school, or at least to that one.
The kitchen was mandated to provide both regular and vegan options in equal amounts, despite that the vegans made up a fraction of the total school's population. I found out the kitchen throws out the vegan stuff every day, and that it didn't taste bad.
I've had bad vegan substitutes, but this wasn't, so I added a bunch of the vegan food to my regular food every lunch.
I eventually noticed I was getting angry, hateful glares every single day from this one table where the same 12 to 15 guys sat. I asked my classmate about that and she told me those were the school's vegans. They really hated that I touched their food and ate it along side my none vegan food, despite that the kitchen literally had to trash large portions of it every day.
If you want to convince people to become vegan,--or even vegetarian--you need to be inviting to them. The same goes for any political or religious movement; if you actively alienate people and tell them that they aren't welcome before they can even try to join, then they likely never will.
I was a Mormon missionary. Yeah, it's a cult. And you know how they recruited new cult members? By being extra loving and kind to people that were considering joining (and also hiding the really weird shit, like how they believe they eventually become gods themselves). It's called "love bombing". Mormons are absolutely, 100% convinced that they have the only correct religion, and that all other religions are false. But they will be your best friend ever while they're trying to lure you in.
Vegan is more than a diet so I get their shitting response. A good reason I always used plant-based and just advocated for people to eat more veg and less meat/dairy.