No insult intended, but I just don't see all those 144,000 as Jewish. I do however, see the tribes mentioned there of Judah, Benjamin, and Levi as mostly Jewish, but definitely not the others. The word Jew specifically comes from the sole tribe of Judah.
Per God's Word starting at 1 Kings 11, the ten tribes of Israel that dwelt in the northern lands of Israel were split off from Judah and Benjamin who dwelt in Judea to the south. God setup Jeroboam as king over the ten tribes, as Jeroboam was of the house of Joseph. Solomon had put Jeroboam in charge over the house of Joseph beforehand.
When Solomon's son Rehoboam of Judah began to reign at Jerusalem, he gathered mighty men of the tribes of Judah and Benjamin to go north and bring the kingdom back under his control. God stopped him, and said the split was of Him. A king of Judah at Jerusalem over the tribes of Judah and Benjamin, and a king over the ten tribes in the north with their capital city of Samaria because two separate kingdoms. And they had war against each other.
When king Jeroboam tried to stop people of the ten tribes from going down to Jerusalem to worship, he setup common priests of the people, which meant the Levites among the ten tribes were forced to go to Jerusalem and join with Judah and Benjamin. In God's Word the southern kingdom was called the "house of Judah" (tribes of Judah, Benjamin, and Levi). And the northern kingdom of Israel was called the "house of Israel". After that historical split prophecy is separately given for each house and is not to be confused to all Israel.
Because Jeroboam king of the house of Israel (ten tribes) setup false worship in Dan and in Bethel, God brought the kings of Assyria upon the ten tribes, and removed all of them to the lands of Assyria and the Medes. They never returned to the holy land as a people since. Only the house of Judah (Judah, Benjamin, and Levi) remained at Judea/Jerusalem. As the kings of Assyria were accustomed to doing with conquered peoples, Gentiles of five provinces of Babylon were removed and put in the lands where the ten tribes had been. Those became the later Samaritans, and were non-Israelites.
Then around 120 years later, the house of Judah fell away to false worship, and God brought the king of Babylon upon them and took them to Babylon for 70 years. That was a whole different captivity than the ten tribe's captivity to a different geographical location. So God kept His promise that He would scatter His people if they went a whoring after the false gods of the pagan nations, and God removed them all from His sight.
But after the 70 years Babylon captivity of the "house of Judah", a very small remnant of them returned to Jerusalem to rebuild the city, walls, and temple (Book of Ezra). The Jewish historian said that's when those returning began to use the title of 'Jew', and all that dwelled in the land also took that title of Jew (i.e., non-Israelites that returned with them to Judea). The majority of the house of Judah stayed in Babylon. God had taken care of them, increased them, and they were content dwelling in Babylon. Many of them were later further scattered through the nations.
Thus the title of Jew never historically applied to the ten tribed house of Israel.
Today that title of Jew is often misapplied to all the 12 tribes, much like how many confuse the idea of a democracy with a republic. Some small remnants of the ten tribes that dwelt in the southern cities of Judah elected to stay with the house of Judah during the split (1 Kings 12:17). That's how we read of the woman Anna in the NT being from the tribe of Asher. To this day, those two houses have not been joined back together in the holy land, as God's promised He will eventually do with the restoration of Israel under Christ Jesus.
When that Bible history is understood, and followed as written, then it gives a different meaning to who those 144,000 of Rev.7 are. Only three of those tribes represent the Jews of the house of Judah. The rest represent the ten tribes of the house of Israel, which have become mostly lost to theirselves and lost to the world, but not lost to God.