I've heard of Salibi's theory, but I'm curious whether these excursions will bear "spiritual" or theological fruit. I mean to ask whether we should expect this kind of revisionist history to have interesting philosophical and theological consequences for the Christ of faith. Otherwise, they strike me as red herrings.
I can see how the revisionist theory that Jesus studied in India might imply an Eastern or perennial interpretation of Christianity. But what's the theological upshot of bringing in Arabia to the Judeo-Christian context, besides an unearthing of differences in historical detail?
I said that Jesus mythicism, too, is a side issue, philosophically speaking, but that theory obviously challenges literalistic Christianity. Salibi's theory does so too, so on that point there would be no disagreement. If you mean to resurrect the Christ of faith somehow from these revisionist histories, I'm not yet seeing it.
The question I'd have is what sort of Christian or spiritualist you are.