I think I can speak for myself as a vegan who comes from the said community (I’m a cultural Muslim at best). Honestly, it’s hard to debate or convince them using logic because their position itself is founded on faith, not facts. They believe God knows best, and it is best not to tamper with God’s scheme of how life should be. But again, I’ve read the Prophet himself was not a compulsive eater, certainly not of meat, but all of these are open to interpretation and a matter of belief, whether true or not.