American veganism is like American Christianity. Sometimes fine and wholesome, especially when kept to oneself; but often a toxic, blatantly lying, proselytizing cult when in a group
If you want to be vegan, more power to you. But please talk to your doctor first (and optionally do a bunch of reading from non-specifically-vegan sources about how the food is grown). The nutrition-feasibility, health benefits, and current, real-world environmental impact are frequently and loudly lied about by many vegans.