In that case, an impartial third party would probably consider that harassment, regardless of your feelings. And it can be harassment even if they didn't intend

In that case, an impartial third party would probably consider that harassment, regardless of your feelings. And it can be harassment even if they didn't intend to harass you/did it unknowingly. However, you _feeling_ uncomfortable is not enough. If you feel uncomfortable with people eating meat around you, that's your problem and not harassment, because eating meat is reasonable in our society.