I still don't understand what you mean. What difference does it make that the Ori are now evil and would now not mind the message? Or hell, even if they would have endorsed it from the start? The social commentary is that this sort of scripture can (and will) be interpreted to suit the agenda of the person interpreting it, the motives of the Ori, or even whether they exist or not isn't really relevant. The point they're making isn't that religion is essentially good until it's corrupted or warped, it's that religioun is a powerful tool you can use to justify just about anything.