It's a broad one. We've been here often, if for the sake of argument you control for issues that are brought forth like suffering or the environment, the overwhelming response will default back to saying those thing actually didn't matter because meat is murder anyway.

Granted "some vegans" would be more precise, but that's still the sentiment.

The parent didn't indicate they were a vegan at all, they just described an ideal.

You were just so ready to attack vegans that you don't appear to have read what they wrote.