The point I'm about to make sort of falls down in the fact that Tash actually appears in the Last Battle, but could it be that Tash is simply another religions distorted view of Aslan. THis would be much like the opinion that other major world religions are worshipping the Christian God, but it is distorted and so they do not understand the fundamental truths of Christianity, which are the key to eternal life. I know that makes no sense whatsoever, but I hope you can piece some sense out of it.
P.S. This isn't my opinion but I know other Christians who feel this way.
