I have the urge to embarrass my vegan brother over his actions at a party that he said he wasn't coming to.
Why do you want to embarrass your brother?
I find the behavior of my brother weird when it comes veganism..
Relationships with your siblings can be difficult but you shouldn't embarrass them in public. It is rude and will make you seem like a bully.
He should learn that the world is cruel.
It's okay to have certain opinions on things, but outing your brother because he's vegan isn't fair to him. There's nothing wrong about being vegan and it does have some health benefits. I recommend doing some research and do it and it may change your mind.