I’m alarmed by how interesting I find this comment by J-D in the Christian thread.
Attempts to answer the question of whether the God of Christianity and the God of Islam are the same God confront some of the same difficulties that confront attempts to answer the question of whether Ares and Mars are the same god, or whether Mars and Tiw are the same god; or, for that matter, whether the creatures that Chinese people call dragons and unicorns are the same creatures as the ones that European people call dragons and unicorns.
There must be a vast literature about this in philosophy of language and philosophy of fiction, and those of you who know it will doubtless find what I have to say extremely naïve. If someone can point us to some interesting work and/or, even better, explain it to us, that would be great. But here goes with a naive blog post.
I’ve no idea whether the God of Christianity and the God of Islam are the same God, and some of the difficulties in assessing whether or not they are are indeed the same as those involved in assessing whether Mars, Ares and Tiw/Tyr are the same god. So I tried to think about which difficulties might be different.