I have no ire towards them - These are my good FRiends, and not so long ago, I thought like they do. Shoot, I still DO think a lot like they do - Steel sharpens steel..
Every point you try to make, you must begin at the absolute foundational level, and even then you will draw a blank.
That is why I am focusing upon the barren woman (I bet you know who she is) - This is exactly the verse that finally proved to me that I was down the rabbit hole, and taught me to seek out the whole Word of YHWH.
Shalom. The Truth IS out there :P
Before I'm ready to discuss Isaiah, Chapter 50, this must be said: 1 Peter 1:10,11."Of which salvation the prophets have INQUIRED AND SEARCHED DILIGENTLY, who prophesied of the grace that should come unto you: SEARCHING WHAT, or what MANNER OF TIME, THE SPIRIT OF CHRIST WHICH WAS IN THEM DID SIGNIFY, when it testified beforehand the suffering of Christ, and the glory that should follow."
They did not search merely concerning the "manner of time", the character of the times, during which these things should transpire. They searched and inquired diligently to discover "WHAT...the Spirit...did signify,", what HE MEANT, "when He testified beforehand the suffering of Christ and the glory that should follow." And the next verse goes on to explain that GOd revealed to them that they were ministering, not to themselves, but to THOSE OF A FUTURE TIME.
So we know that the OT prophets wrote, without understanding exactly who or when, to a future generation of people about future events.
So it is with Isaiah 50. It was Judah that God said He would divorce. Because of the people selling themselves to commit sin (v1), the Babylonian captivity of the kingdom). He says that Judah is hopeless to try to be redeemed by man. He makes it clear that only He and He alone could redeem, and confirming it with what He had done by His power in the past (v2-3)
All of this prophecy is future when Isaiah wrote it. The divorce between God and Judah took place over 100 years in the future, when the Babylonians took captive the kingdom.