Well in one sense he shouldn't have to prove anything like this to you Seth. Why should one have to prove clear statements of scripture? See the verse below,
Behold my hands and my feet, that it is I myself: handle me, and see; for a spirit hath not flesh and bones, as ye see me have. Jn 24:39
I'll illustrate on another subject. About the virgin birth. One can ask when Jesus was born of a virgin? One can ask where was Jesus born of a virgin? One may even ask why was Jesus born of a virgin? You don't have a right to ask that is as a Christian was Jesus born of a virgin? LIKEWISE Seth you cannot ask was Jesus resurrected body flesh and that's what you're doing. Jn 24:39 says it was! If I were you I'd dial back from what you've been asserting immediately.