Just a thought about the true final Palace... (MAJOR SPOILERS(I think, just warning either way))
So, I guess this is technically about religion, but if the shadows and the final boss were based off of Christian figures, like the God of Order and literally all of the angels, then wouldn't it technically be demons vs. angels? Is this a callback to SMT?? Either way, I had this thought throughout the entire palace... But the boss uses the Seven Deadly Sins against the Phantom Thieves, so would that make him a bad god posing as a good one? What are y'all's thoughts on this?