Thayer's Greek Lexicon
STRONGS NT 2453: Ἰουδαῖος (Judæan)
…The apostle John, inasmuch as agreeably to the state of things in his day he looked upon the Jews as a body of men hostile to Christianity, with whom he had come to see that both he and all true Christians had nothing in common… even in his record of the life of Jesus not only himself makes a distinction between the Jews and Jesus, but ascribes to Jesus and his apostles language in which they distinguish themselves from the Jews, as though the latter sprang from an alien race… especially the rulers, priests, members of the Sanhedrin, Pharisees — he does not hesitate to style οἱ Ἰουδαῖοι…

Strange, that's an oddly specific thing for Saint John to do. It's as if the Jews were recognised as an entirely different race of people from Judahites, both who inhabited Judæa as citizens.

Such as the Idumæans who were known to have been conquered and joined the country as citizens [Josephus Antiquities 13:9.1; Strabo Geography 16:2.34] who instilled their own Idumæan king (Herod) [Josephus Antiquities 14:15.2] who used his position to fill the priest classes with fellow Idumæans, such as the Pharisees [Josephus Wars 2:8.2] who murdered Jesus. The same Idumæans who would start several wars with Rome [Josephus Wars 4:3.1-2] and be expelled to North Africa (Sephardic) and Khazaria (Ashkenazi).

It's almost like it's been right in front of our noses the entire time.