You’re not stealing it; you feel you’ve earned it. Your national origin is Person A’s impetus for shooting you and taking it. Do you respect their belief and allow them to act accordingly?
Instead of condeming omni's for their choices just lead by your own quiet example and demonstrate to them that a vegetarian diet is superior to an omni diet. Example: My best friend CJ is hardly a hippie and is in fact a bit of a good ol' boy that used eat a real meat n taters type of diet. Last summer CJ stayed at my house for two weeks. I'm vegetarian so he ended up eating vegeterian during his stay. Afterwards he tried eating meat and ended up sick as a dog because his gallbladder problems were aggravated by consuming meat. CJ became a vegetarian after that. Since then he gone from 325 lbs to 280 lbs his gallbladder problems have gone away and his blood sugar levels have stayed lower than before. Just be a quiet unobtrusive example and you just win some converts!