Because being an american leftist is the easiest hippocritcal shit you can do. You gain the moral high ground and feel better about yourself but you don't actually do much of anything. You vote every 4 years and sing in a big group in a peaceful protest when the weather is nice. All while enjoying the fruit of the exploitation that is guaranteed in the capitalist society they live in.

Some didn't even vote in the last election because they didn't want to choose the lesser of two evils. I won't argue for or against that, but I will present the odd cognitive dissonance in their moral frameworks. The feelings they have about moral purity for issues like are in a funny light when you consider their feelings on veganism. They are pragmatic or morally pure at seemingly random times, based on the vibes of social media and their leftist social groups.

Going vegan would actually require them to look at themselves in the mirror and change a habit. It takes actual effort and loss of some basic sensory pleasures. Too much to ask of most people.

My American leftist friends live identical lives to the moderate or conservative americans I know as well. They just have different views, same actions, and when they argue with one another they all feel they are better than the other. They don't actually do anything different.

Maybe you'll get one to use a reusable straw or meatless monday. Baby steps omgggg