Vegans

My boyfriend thinks vegans are "uninformed" and holy heck I went off on him. He thinks that vegans are unhealthy and negativity impact their own health. I got so mad. I told him that vegans get protein in many ways that isn't meat or animal related. I've had friends who are vegans and vegetarians and they know what they need to eat to be healthy. They're perfectly fine. They chose to be vegan for a reason. They are who they are. They aren't "uninformed"🙄 you certainly have to be informed in order to be a vegan and be healthy. I completely disagree when he says that vegans are unhealthy. I am not a vegan. But I definitely support their decision. Am I wrong for telling him these things?