They would be if they were presented and relevant. Historians frequently miss a lot, do shoddy research, as the one you cite obviously did, and write to their prejudices or to those of their backers. This unfortunate condition is well known.
Well, since you have not provided any contrary facts, I believe a major published historical work takes predecence over your opinions.
Your entire position rests upon the notion that Judah and Israel are already united. Why, then, as Mr. Diego points out, have no prophecies been fulfilled by this "combined" nation? The country called "Israel" has not been a blessing to all nations in any way, shape or form. If Judah and Israel are still separate, then the question remains: where are they, in the numbers they must be to fulfill prophecy, specifically Hosea and Ezekiel?
Go study some prophecy and find out what Dispenstionalists teach regarding Israel.
Start with the Scofield notes.
The Jews are not fulfilling any predicted Old Testament prophecy today because Daniel's 70th week was put on hold until after the removal of the Church (Rom.11).
Today, all 12 tribes are in existance and are known as Jews.
The Old Testament prophecies will be fulfilled when the church is removed and Daniel's 70th week begins, the time of Jacob's trouble (Jer.30:7).
Israel and Judah will be reunited as a Kingdom under Christ, and they will all be the racial seed of Abraham, Isaac and Jacob.
Today, since they do not know their individual tribes, all Israelites are Jews and all Jews are Israelites.
As both the ISBE and Easton's Bible Dictionary state, 'during the Captivity, and after the Restoration, the name,[Jew] however, was extended to all the Hebrew nation without distinction'
You are trying to make history fit your bad theology, but a false premise must lead to a false conclusion.