RUTHFULLY YOURS

The U.S. has already acted to gain recognition of three key truths that had long been diplomatically ignored: Jerusalem is the capital of Israel; very few of the Palestinians that the U.N. Relief and Works Agency supports are actually refugees; and the U.N. has been unacceptably biased against Israel.

Now the U.S. can tip the political balance toward peace and stability by insisting on two other truths. First, despite widespread use of the term in diplomatic documents and debate, there is no such thing as “occupied Palestinian territory” because there has never been a Palestinian territory to occupy. As some Palestinians point out, they have never had a state of their own. This is far more than a game of semantics. If the land was Palestinian, then Israel could have stolen it. If the land isn’t Palestinian, then Israel couldn’t have stolen it. It’s critical that the U.S. actively combat the falsehood that Israel exists on stolen Palestinian land.

The second falsehood is married to the first. The Palestinians not only claim that all the land is theirs, they also deny any Jewish connection to it. During the failed Camp David talks in 2000, Palestinian Authority President Yasser Arafat stunned President Clinton by asserting the Jews had no connection to the Temple Mount in Jerusalem, the place where the first and second Jewish temples stood.

Mr. Clinton may have been surprised, but the Palestinian denial of any historic Jewish connection to the land is nothing new, and it continues. Since the Palestinians know that hardly anyone outside the Arab who would agree with them, they rarely say it in English.

But there is no such restraint on official Arabic-language Palestinian television. On March 15, 2017, a presenter said there is “no evidence” that Jews prayed at the Western Wall—where Jews have faced to pray for 2,000 years—before 1917. On Nov. 15, 2017, a Palestine Liberation Organization official went on the air and said, “It is a Zionist invention that this is the land of the Patriarchs. . . . The Jews were expelled from Europe to get rid of them so that the West would have a permanent base in the Middle East.” The Palestinian narrative, drummed in through the schools and media, is that Israel is a “crusader state” that will eventually be eliminated.

Everyone has a right to his opinion, as Sen. Daniel Moynihan observed, but not his own facts. Ancient Israel is a historical fact, founded by King David in 10th century B.C., interrupted by the Babylonian exile in the sixth century B.C. and ending with the Roman sacking of the Second Temple in A.D. 70. Even during the exile there was a continuous small Jewish presence in the land of Israel. In Jerusalem Jews became a plurality of the population by the middle of the 19th century.

Palestinian denial of this history has consequences. If the Jews had no connection to the land, recognizing Israel would be a capitulation and a humiliation. But because the Jews, like the Palestinians, have legitimate claims, peace with Israel can be based on an honorable compromise.

The U.S. should demand that Palestinian leaders recognize the Jewish connection to the land, no less than Israelis recognize the Palestinian presence and demand for statehood. The denial of Jewish history leads to the denial of Israel’s right to exist. So long as this continues, it is the Palestinians, not the Israelis, who are refusing to accept a two-state solution—and the U.S. should say so.

The truth is important, but it may not be enough. The U.S. should launch a diplomatic campaign to persuade other nations and international bodies to set the record straight. It’s important to explain that parroting Palestinian falsehoods harms the cause of peace.

Within the community of nations, the U.S. truth campaign might seem quixotic, but U.S. persistence could embolden suppressed moderates in the Arab world. By speaking the truth, the U.S. could help give these brave people a voice.

Mr. Singer is a founder and former president of the Hudson Institute, a senior fellow of the Begin-Sadat Center for Strategic Studies of Bar Ilan University, and author of “History of the Future.”