I am not vegan, I eat mostly plant based food but like a bit of venison, occasionally chicken and no intention to give up cheese.
I see a lot of meat eater slagging vegans and find it pretty pathetic! Why get annoyed at them? it is their choice and is doing good for animal wellfare and the planet, the current consumption of meat is not sustainable. It is also a much healthier diet.
I know a few vegans and have never once heard any vegan having a go at meat eaters unless it is in retaliation to a meat eater having a go at them for being vegan, which is something I hear a lot of!
The letter in the original post is very clearly made up as click bait for social media, knowing how meat eaters feel the need to comment on such nonsese (in the same way as people get so upset about EVs....). Even if genuine, it in no way implies all vegans are like this - thats basically how racism works