How to Treat a Rebellious Israel
You say, "God was merciful and allowed Israel to remain in the Land despite her unbelief. … Why could God not act the same in our present day situation?" I answer: He not only can. He is. Israel is in the Land. And it is all mercy. All I am saying with the term "no divine right" is that the promise of God that Israel will someday rightfully possess the Land carries no leverage among the nations while she is rejecting her Messiah.
With regard to the final inheritance of the Land, you suggest that my handling of the promise to Israel "effectively makes its original meaning null." The reason is that I said,
Jewish believers in Jesus and Gentile believers will inherit the Land. And the easiest way to see this is to see that we will inherit the world which includes the Land. Jewish Christians and Gentile Christians will not quibble over the real estate of the Promised Land because the entire new heavens and the new earth will be ours. 1 Corinthians 3:2123: "All things are yours, whether Paul or Apollos or Cephas or the world or life or death or the present or the future—all are yours, and you are Christ's, and Christ is God's." All followers of Christ, and only followers of Christ, will inherit the earth, including the Land.
Does this way of seeing things nullify the promise that God will give Israel the Land? I don't think so. Israel will get no less than promised because the Gentiles get more than imagined. For all I know, in the millennium and in the new earth redeemed and glorified ethnic Israel will locate mainly in the new Palestine. But she will also own the world, and no saint will begrudge her emigration, or any Gentile's immigration.
In the present situation in Israel, I agree with your wise counsel: "we must avoid … drawing a moral equivalence between acts of terrorism against citizens and the efforts of a government to defend its people and territory."
My prayer is that the good news of Jesus, the crucified and risen Messiah, would flood Jewish communities around the world, that the veil would be lifted, and that we would see a massive turning of Israel to the Lord Jesus. "For there is no distinction between Jew and Greek; for the same Lord is Lord of all, bestowing his riches on all who call on him. For 'everyone who calls on the name of the Lord will be saved'" (Rom. 10:1213).