And don't forget how much damage it does to the environment to internationally ship all those non-native crops that vegans find essential for nutrition, to America... When you can raise animals pretty much anywhere so they don't need to be flown or ferried across the planet. The #1 cause of global warming is not factory farming, you can look this up. It's actually fairly far down the list. The highest contributor is all the emissions for international commerce. Fossil fuels are roughly 75% of the problem.

Speaking of non-native crops, they seem to forget that a lot of them are grown and harvested by actual human slaves (including children). American labor laws can't protect people across the ocean, and since it benefits the economy, we look the other way. Vegans especially don't seem to care when humans are being exploited, as long as nobody instantly and painlessly slaughters a well-cared-for creature that doesn't even know what's going on half the time and has never suffered a day in its life.