They won't be united until - and one king shall be king to them all; and they shall be no more two nations, neither shall they be divided into two kingdoms any more at all: That hasn't happened yet.
The "Nation" of Israel is not the same as the "House" of Israel. The 10 tribes (considered the lost tribes) were of the north. I don't know the year of the map you pictured but all the tribes were there at one time. Also remember, that today many that don't understand the separation, improperly consider Israel as Jews.
My point being; is this a current map of Israel, the nation of Israel or is it one of long ago when all tribes were there? Even the name on your map separates them by saying - The kingdoms of Israel and Judah. There is a difference.
Was Jesus a Jew? How about Peter or Andrew or John?
They were all from the Northern Kingdom. By your definition, they would have been of the lost tribes. But Jesus' geneaology suggests he was from the tribe of Judah. So what was he doing spending 90% of his life in the Northern Kingdom?
The fact is that by the time Christ was born, the tribes had intermarried so much that it was almost impossible to determine which tribe you were. Only God knew.
First, no in is saying that the nation of Israel is the House of Israel.
The House of Israel and House of Judea are a divided kingdom.
Second, many people from the Northern Kingdom did in fact stay with the South.
Third, those same tribes, called the house of Israel are referred to by Peter as being responsible for crucfying the Lord. (Acts.2:36)
They couldn't have been responsible if they were not present.
Now, reuniting by the Lord of the two Kingdoms will occur when the Lord reestablishes the Davidic Covenant under Christ.
No Gentile nations are being blessed as Israel.
The Jews are composed of all 12 tribes, since Christ is King of the Jews, all 12 tribes, not just 3.
Thus, the notion that because Israelites are not directly called Jews is simply 'straining at a gnat' because they are indirectly called so.
My point being; is this a current map of Israel, the nation of Israel or is it one of long ago when all tribes were there? Even the name on your map separates them by saying - The kingdoms of Israel and Judah. There is a difference.
No one disputes the fact that Israel and Judah divided, but the fact is that when they returned, they returned with members from all 12 tribes, not just 3.
Likewise those Israelites who did not return to Israel, but remained in the Persian Kingom were also called Jews (Esth.3:13) and those lands were the same lands that the Assyrians had taken the original 10 tribes to.
Thus, by then, they were being called Jews also.