God can settle this argument very easily: "Whatsoever hath no fins nor scales in the waters, that [shall be] an abomination unto you" (Leviticus 11:12). This is not a spiritual matter. This is a health matter. Unclean creatures are deleterious to the body. When Jesus walked the earth and Peter received the vision in Acts 10, a miracle of how these "clean up waste" creatures digest content did not change. And we would have far less health issues if we complied with God's rules on what is and what is not food.