God has not and never will be unfaithful to Israel or any other people. As you stated, God's promises are conditional. As one meets the conditions the promises unfold in God's timing. All of God's Word manifest itself, it does not return back void (Isa. 55:8-11). And as you also stated, the New Testament is filled with passages of the Old Testament because the New is the fulfilment of the Old. This is a good study.
God has not and never will be unfaithful to Israel or any other people. As you stated, God's promises are conditional. As one meets the conditions the promises unfold in God's timing. All of God's Word manifest itself, it does not return back void (Isa. 55:8-11). And as you also stated, the New Testament is filled with passages of the Old Testament because the New is the fulfilment of the Old. This is a good study.