Israel Did NOT Keep God's Covenant; This is Why the Land is NOT Theirs.
"For I know that after my [Moses'] death you [Israel] will surely act corruptly, and turn aside from the way which I have commanded you; and in the days to come evil will befall you, because you will do what is evil in the sight of the Lord, provoking him to anger through the work of your hands." Deuteronomy 31:29
". . . [A]nd you shall be plucked off the land which you are entering to take possession of it. And the Lord will scatter you among all peoples, from one end of the earth to the other. . ." Deuteronomy 28:63-64
"In those days there was no king in Israel; every man did what was right in his own eyes." Judges 21:25
The people of Israel did not fulfill their covenantal agreement with the LORD; therefore they have never been entitled to inherit the land that the LORD promised to them.
It's as simple as that.
When God gave Israel the Law, he knew they would not keep it; he knew they would fail to uphold their end of the covenant (see: Deuteronomy 28:63-64). Why, then, did God give the people of Israel the law to begin with? Why did he bind them to obey that which they could not keep?
St. Paul tells us that "Law came in, to increase the trespass; but where sin increased, grace abounded all the more, so that, as sin reigned in death, grace also might reign through righteousness to eternal life through Jesus Christ our Lord" (Romans 5:20-21).
The law came to reveal our sinfulness. Jesus Christ came, died, and rose again from the dead in order to save us from our sins; by grace.
When St. Paul was confronted by Jewish Christians who believed that the Gentile Christians were required to keep the Law of Moses in order to be saved, he told them:
"Now therefore why do you make trial of God by putting a yoke upon the neck of the disciples which neither our fathers nor we have been able to bear? But we believe that we shall be saved through the grace of the Lord Jesus, just as they will" (Acts 15:10-11).
Neither Jew nor Gentile Christians can keep the Law; they never could and they never can. We strive to follow Christ, to love our neighbors (and our enemies) as ourselves, but we will always fall short of the mark (i.e., sin). The people of Israel are not entitled to the land of Palestine because they failed to keep God's commandments. They were not simply required to possess the land, they were required to live according to the Law, which they failed, miserably, to do.
How, then, can Christians—Gentile Christians—support the modern nation of Israel and its brutal slaughter of the Palestinian peoples? Is this how we are to love our neighbors? Is this how we are to love our enemies?
Christians, Muslims, and Jews have differing beliefs concerning God, but none of these three faiths sanction the murderous oppression of innocent peoples. Israel's slaughter of innocent civilians in Palestine—especially Gaza, which is a walled-in, blockaded concentration camp with no place for innocent civilians to hide—is morally wrong; as are the American Christians who support Israel; as is the U. S., because it supports (and arms) Israel.
And God will be our Judge.
The blood of innocent Palestinian children is upon the hands of all Christians, especially American evangelical Christians, who support Israel's murderous oppression of the Palestinian peoples, and their innocent blood cries out to God from the ground, upon which it was spilled, for vengeance.
God will avenge the blood of these innocents; you can count on that, because God HATES those who shed innocent blood:
"There are six things which the Lord hates, seven which are an abomination to him: haughty eyes, a lying tongue, and hands that shed innocent blood, a heart that devises wicked plans, feet that make haste to run to evil, a false witness who breathes out lies, and a man who sows discord among brothers" (Proverbs 6:16-19).