Paul, the "faith without works", "just believe Jesus = God and you'll be saved" guy? That's your point of reference? Even in its nonsense, Paul without Jesus is nothing, but here you are saying "how do you know Jesus was that guy?" And the Sermon on the Mount is basically the ideological basis and the soul of everything good in Christianity! And you gotta pick and choose, because of corruption and obvious nonsense. What makes sense stands by itself, what doesn't doesn't, and when we meet God (I assume you believe in that at least...) we'll explain ourselves. Also, much of scripture is just letters from one group or dude to another, like by their own admission not "the word of God". It can make sense, it cannot, what was kept in the Bible can be gold and it can also be shit.

You're very confused, both about the world and in your internal belief system, it's completely incoherent, but to you your system and to me mine, I guess. 🤷