Nothing personal, but actually, I think you did miss something. Look at your question(s) again. There's a reason I referred to it as "complex" which has a meaning. Ask yourself or
@HeIsHere and
@cv5 precisely what they were responding to. If I'm wrong I'm wrong, which is why I said "It looks to me like..."
God said quite a bit more about His choice of Israel and its purpose which flows from His choice of Abraham and the promises He made to Abraham that ultimately came to fruition in his "Seed".
It's your assumption or position that God choosing Abraham, Isaac, Jacob/Israel - the man and the nation - then the Christ establishes what you propose, but for good reason it's not the position of all theological traditions other than the one you continue to deny you agree with, as I understand you, yet now we're beyond the T and into the U and it's hard to distinguish between you and others who unabashedly wear the label.
Also, there have been a few here who have brought up the fact of election to service that needs to be figured in, let alone whether or not all of Israel was elected to be saved which must also be dealt with.