So Jesus supplied fish to the masses because he though fish were vegetables?
In heaven, I take it literally that the lion will lay down with the lamb. But that is not to say that it is a sin to kill an animal for food or other suitable reason (protecting livestock, crops, skins, etc.)
But Paul also talks about food saying something like “What comes out of a man’s mouth is more important than what goes into it.”
And IIRC the meat he was talking about was meat that had been sacrificed to the various gods, and then sold on the street afterwards. But that it was okay to eat it.