They didn’t say anything about feeling morally superior, they just explained where and why many vegans differentiate between plants, bacteria, and animals. And let’s not pretend that other people, including non vegans, don’t also draw these lines at any other point, and don’t only bring up these supposed areas of debate whenever veganism is brought up. It’s a personal choice based on personal motivations, just because someone holds a different view from you that doesn’t automatically mean they feel superior to you. This comment is giving me the feeling you’re just looking for an excuse to rag on vegans, when they’re not even the ones who started the discussion.