All this while true is a red herring to the question of Scripture's authority. For Christianity, authority of anything on divine matters rests on its connection to divine revelation. God actually revealed his word to mankind; the actual infinite Ancient of Days has revealed and inspired something, someone, out there, to convey his very word itself. By reading Scripture, you are reading divine thoughts themselves. If the infinite creator of reality as such, chose to convey his message via messengers, that is the thing we call divine revelation, and accord it the highest authority that a human being can accord to something. That's it, that's the gist of it. The clever points about transmission delays, various eras, obfuscate this basic point that this is revelation itself we are dealing with. You're not allowed to look at Muslims and say, "whatever they are, I share nothing with them." First of all, are you islamophobic? We recently saw leftists widely calling Justice Clarence Thomas the n****r word on Twitter, so we know just how deep or how shallow many leftist 'virtues' of 'tolerance' are. So stop using Muslims as the byword of all that is bad and evil. It doesn't matter what they believe, or how similar or foreign they are to us, or we to them. They are a copy of us. According to John of Damascus, Islam is but a later corruption of Christianity, a form of a Christian arian heresy gone amuck. So they are following us; not we them. That doesn't mean they copied us, or that by looking at them we can find the Christian way of doing things. As I said, they are a later corruption. So what can we learn about ourselves by looking at them? Nothing. We have nothing to do with them, we came prior to them, and we have our own very strong and unassailable doctrine of Scripture, divine inspiration, revelation. We may have views which overlap with them, or differ from them. Let's rest our thoughts on our own doctrine of Scripture, rather than trying to consider ourselves the very opposite of those brown people whom we enlightently consider so distasteful.