... and my only response is: G-d's covenant with Abraham was for all of his descendants through Isaac. Since G-d is eternal, and is not a liar, the covenant still applies and always will. Ditto for promises to Isaac, Jacob and the Jewish people in the time of Moses and subsequently through the various Prophets. Punishments meted out to the Jewish People over the millenia are akin to punishments given by parents to their kids - they express varying levels of displeasure, and seek to change behavior. But your children are still and always your children even if they misbehave, and one could say the same of G-d's relationship with the Jews.
Point of Order: since I do not believe in the validity or Divinity of the Christian Bible, and since your faith as a Christian is heavily dependent upon the Hebrew Bible (your "Old Testament," in which Jesus believed), I think that it is only sensible to debate/discuss/explore theological concepts with the use of Hebrew Bible/Old Testament text.
Why has He not spoken to you?
Is your God dead?
Does He have no ears no eyes no mouth to speak with?
Where are the prophets of today speaking out for God like Isaiah, Jeremiah, speaking of the condition of Israel crying out for repentance?
Seems like your God has not spoken for over 2000 years. Where is His promises fulfilled is He a lier? NO!
They have all been fulfilled in Jesus the Christ!
The only thing not yet fulfilled is that great and terrible day of the Lord! When men will find no place to hide from the face of GOD!