I care about other people senselessly killing creatures that don’t have to die because they like the flavor.

I think with this statement you’ve uncovered the heart of the issue. Your interest in other people’s diets is unwelcome and those who do not welcome your interest are simply returning the favour.

If one pokes one’s nose in other people’s business, one should expect negative responses.

Edit: pretty ironic that you accused me of putting my head in the sand and then downvoted this comment with no response.