live as the Jews

Boyd’s Bible Dictionary:

Contraction of Judah
Man of Judea (2 Kings 16:6; 25:256At that time Rezin king of Syria recovered Elath to Syria, and drave the Jews from Elath: and the Syrians came to Elath, and dwelt there unto this day. (2 Kings 16:6)
25But it came to pass in the seventh month, that Ishmael the son of Nethaniah, the son of Elishama, of the seed royal, came, and ten men with him, and smote Gedaliah, that he died, and the Jews and the Chaldees that were with him at Mizpah. (2 Kings 25:25)
). After captivity, Hebrews in general (Ezra 4:1212Be it known unto the king, that the Jews which came up from thee to us are come unto Jerusalem, building the rebellious and the bad city, and have set up the walls thereof, and joined the foundations. (Ezra 4:12); Dan. 3:8-128Wherefore at that time certain Chaldeans came near, and accused the Jews. 9They spake and said to the king Nebuchadnezzar, O king, live for ever. 10Thou, O king, hast made a decree, that every man that shall hear the sound of the cornet, flute, harp, sackbut, psaltery, and dulcimer, and all kinds of music, shall fall down and worship the golden image: 11And whoso falleth not down and worshippeth, that he should be cast into the midst of a burning fiery furnace. 12There are certain Jews whom thou hast set over the affairs of the province of Babylon, Shadrach, Meshach, and Abed-nego; these men, O king, have not regarded thee: they serve not thy gods, nor worship the golden image which thou hast set up. (Daniel 3:8‑12)). Antithesis of Christian in N. T. (John; Rom. 1:1616For I am not ashamed of the gospel of Christ: for it is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek. (Romans 1:16)).

Concise Bible Dictionary:

A man of Judah. The term does not occur until after the division of the kingdom (2 Kings 16:66At that time Rezin king of Syria recovered Elath to Syria, and drave the Jews from Elath: and the Syrians came to Elath, and dwelt there unto this day. (2 Kings 16:6); 2 Kings 25:2525But it came to pass in the seventh month, that Ishmael the son of Nethaniah, the son of Elishama, of the seed royal, came, and ten men with him, and smote Gedaliah, that he died, and the Jews and the Chaldees that were with him at Mizpah. (2 Kings 25:25)). It is applied to any one belonging to the two tribes, and it may have been used respecting any of the ten tribes who remained in the land at the captivity or returned thither. The name is principally found in the Old Testament in Ezra, Nehemiah, Esther, and Jeremiah. In Esther the name is applied to all the Hebrews in Persia. In the New Testament the name occurs most frequently in the gospel of John, where it is applied to those of Jerusalem and Judaea in distinction from “the people” who may have been Galileans or visitors from a distance. John speaks of “the Jews,” “the Jews’ passover,” and so forth, as though he were not a Jew. They had rejected the Lord, and in spirit John was separate from them.

Strong’s Dictionary of Greek Words:

Greek:
Ἰουδαΐζω
Transliteration:
Ioudaizo
Phonic:
ee-oo-dah-id’-zo
Meaning:
from 2453; to become a Judaean, i.e. "Judaize"
KJV Usage:
live as the Jews