The core problem is that you're making it harder to be an environment supporter. It's the equivalent telling the average Joe that if he supports the environment but still eats meat daily he's a hypocrite and should feel bad. The environmental impact of raising meat is well known, so advocating for environmental measures while not taking the trivial effort of not eating meat one day per week is pretty hypocritical as well. I'm not sure about you, but I'd rather have as broad support base as possible to get environmental measures promoted and passed, than a smaller group of diehard activists each trying to police each other on ideological purity.