I never tell anyone what they should be eating, except my patients. People seem to want to discuss my food constantly, however.
I meant that in a more general sense, not suggesting that you're assaulting people with spirulina.
The mere fact that some people choose to be vegan can make others feel uncomfortable because they wonder "am I making the wrong choice?"
Whether it's at the personal level of feeling one's choices challenged or at a larger level of being told that our society's addiction to meat is terrible for the environment the result is the same. No one likes being told they shouldn't be doing something they enjoy.