I had an ex go vegan when I was with her she did honestly turn fully nuts in the fact she decided her cat was now vegan and began constantly trying to blackmail me into it.
Yeah that's why it ended as well, my favourite food is a beef curry and I love a good burger.
Granted I don't think all Vegans are like this it's just my main experience with it.
I think pescatarians are crazy and secretly love helping the ocean life be obliterated. At least with beef, the destruction of entire ecosystems is mostly halted and the cowboys didn't muster any dolphins and a thousand random other species into the abattoir, all the while blasting diesel and country music so loud that animals in a few hundred km radius can't survive normally.
They also generally wait for the cows to live long enough to finish growing.
I'm not defending it. But those cows are born to die.
This does not occur in the ocean and is why fish are rapidly dwindling in size and numbers, damaging massive ecosystems along the way.
You can't overcow cows, you just make more. But we overfish fish all the time even with such low standards for what "overfishing" is.
Seafood is the hidden destroyer of much of the world's living nature. But conveniently it is easy to ignore because you don't see under the waterline, and it's too difficult to regulate properly. Can't just roll up to 100 boats like you can 100 farms.
If someone wants to hate on meat but say fish is okay, the least they can do is cut out all seafood unless farmed. While that's ironically just bringing them up to a level no different to land meat, at least they wont be decimating all the bulk of life on earth they mockingly claim to hold so dear but forget is mostly in the ocean.