Because for the Jews to embrace the person, thinking he is their messiah, his must be a Jew - someone perceived to be descended from King David.
That's the problem Doug, when you go down one rabbit hole, it creates a false notion elsewhere, you are correct, the Jews would never accept a Gentile as their king, but they chose 2 or 3 Jewish people 2000 years ago, Agreement is NOT about accepting a Messiah, its about Israel entering an Agreement and that Agreement will be them joining the E.U. The difference between you and I is I can prove my poinrs via scripture, you just throw something out there.
Dan. 8:9 tells us the A.C. has to be born in Greece.
9 And out of one of them came forth a
little horn, which
waxed exceeding great, toward the south, and
toward the east, and
toward the pleasant land.
Since we know the Little Horn/A.C. conquers Israel the WAXES GREAT TOWARDS = Conquers.
So, now we need to understand Dan. 11 gives all the Greek Kings for a reason. Here in Dan. 8:9 we see in this Four General battle (the 6 Syrian Wars with one yet to come) Field that at the very end the Little Horn conquers TOWARDS the East (Turkey/Seleucus) TOWARDS the South (Egypt/Ptolemy) and TOWARDS Israel. And we can see this actual battle in Dan. 11:40-43, he goes through COUNTRIES to get at Israel and defeats MANY COUNTIES & Israel, then conquers all of North Africa. He is not allowed to conquer Edom, Moab or Ammon (Central & Southern Jordan where Israel flees unto).
Now, seeing as this is a Four General Tussle that gives is a pretty good sense of DIRECTION, the four winds so to speak. And thus if this man conquers towards the East, South & Israel where does he have to conquer from? The Northwest Corridor (Cassander/Greece).
So, the map tells it all, this "Little Horn" can only come out of Greece in the four general inter kingdom battle, the 7th (divine completion) Syrian War. Now how does the Little Horn of Dan. 7:7-8 fit in? Well, where is Greece at? In the E.U. so the exact same Little Horn that MUST be born in Greece will also arise amidst the 10 (completion kings that arise from the Fourth Beasts Head (E.U. in total). So, he's the E.U. President, who has to also be a Greek born king. Greece is in the E.U. Once he conquers COUNTRIES to get at Israel (Turkey, Lebanon, Syria. Jordan and all of North Africa guess what Papa (Rome) has a son (E.U.) who are identical twins on a map.
Papa Rome covered every square inch of the Mediterranean Sea Coastline
The E.U. after she conquers the land spoken about in Dan. 11:40-43 will look like Old Rome on a map
So, he conquers East (Turkey) and COUNTRIES to get at Israel AND all of North Africa.
Now, in Daniel it is stated that the 3rd Beast will Conquer the whole earth (being spoken about) which is of course referring to the region of the first 6 heads only. So, since Greece only conquered about 1/3 of the Mediterranean Sea Coastline, the Dan. 2 prophecy is fulfilled by this end time Little Horn who is a Greek born king who comes to power in the E.U. and by the way, he will have an Assyrian bloodline also.
He will not, nor can he be a Jew. The False Prophet is a Jew, just like Antiochus Epiphanes and Jason. The king was a Gentile and his sidekick was a Jew.