No point in trying to explain something to someone who won't even try to confirm or disconfirm whether they understand what you've already explained to them. Until he understands the problem of a stolen concept, any argument that depends on it will go right over his head. Either he just doesn't get it (I don't know how many ways we can explain the same thing before the light bulb comes on) or he was being disingenuous when he asked Gae Bolga to explain it again. The latter would be trolling, as has been pointed out.
I'm not anti-Christian. I'm anti-stupid.