The same thing happened to me when i was vegan for some time, and when i became aware of my way of thinking about other people who were not vegan i got scared of myself, in some way you think you are acting out of love and in other way you start hating others who don't agree with your ideology which is totally an absurd state of mind health. I think right now we are in such an state, fighting with each other until finding out that it's not gonna take us anywhere.