I agree with Shadow. I don't know why God chose to use the betrayal route, but it was prophesy. He probably could have done it any number of different ways, but He chose the way He chose. He will do what He will do, no matter what any of us think about it. He is sovereign over all.
It's impossible to understand the mind of God. He reveals enough of Himself, for us to understand about sin and salvation. I think even in Heaven, we will still only be scratching the surface of what God is, but will be spending eternity learning more and more about Him.
Master Sergeant, USAF, retired. Thank goodness for being retired.