You'll have a greater impact on me if you approach me with curiosity, rather than aggression.

For example, all I've told you so far is that I'm not vegan.

You don't know if, for example, I eat eggs harvested from my own happy chickens or harvest surplus honey from my own beehive. You don't know whether I buy farmed meat from a store, or whether I only eat animals that lack any sort of brain

I've already expressed that veganism is good. That gives you inroads for engaging with me, learning more about what I consume that isn't vegan, and offering the options that I might not think of.

Are you angry about people eating meat and harming animals? Good. You should be. I know I am. But I also temper my anger, especially when I'm trying to communicate better ways of doing things with people.