That 144,00 does not signify all of the elect. Thats not necessarily Biblical. It says right there that they come from the 12 Tribes of Israel including the Tribe of Dan.
The unnumbered multitude is the traditional church from all nations of the earth. That is the typical interpretation. Is it the right interpretation, i'm not quite sure.
Typical Premillennial teaching. You got 144,000 part wrong. It is not Jews from physical 12 tribes of national Israel.
Observe carefully:
Revelation 14:1-4 KJV
[1] And I looked, and, lo, a Lamb stood on the mount Sion, and
with him an hundred forty and four thousand, having his Father's name written in their foreheads.
[2] And I heard a voice from heaven, as the voice of many waters, and as the voice of a great thunder: and I heard the voice of harpers harping with their harps:
[3] And
they sung as it were a new song before the throne, and before the four beasts, and the elders: and
no man could learn that song but the hundred and forty and four thousand, which were redeemed from the earth.
[4] These are they which were not defiled with women; for they are
virgins. These are
they which follow the Lamb whithersoever he goeth. These were
redeemed from among men, being the
firstfruits unto God and to the Lamb.
And aren't we, as Christians, also firstfruits in Christ?
Romans 16:5 KJV
[5] Likewise greet the church that is in their house. Salute my wellbeloved Epaenetus,
who is the firstfruits of Achaia unto Christ.
Romans 8:23 KJV
[23] And not only they, but
ourselves also, which
have the firstfruits of the Spirit, even we ourselves groan within ourselves, waiting
for the adoption, to wit, the redemption of our body.
1 Corinthians 15:23 KJV
[23] But
every man in his own order:
Christ the firstfruits; afterward they that are Christ's at his coming.
144,000 is indeed all Elect from Old and New Testament IN CHRIST. We are New Jersualem making up of Elect from Old Testament (12 tribes) and New Testament (12 apostles). One Bride!
Revelation 21:9-17 KJV
[9] And there came unto me one of the seven angels which had the seven vials full of the seven last plagues, and talked with me, saying,
Come hither, I will shew thee the bride, the Lamb's wife.
[10] And he carried me away in the spirit to a great and high mountain, and
shewed me that great city, the holy Jerusalem, descending out of heaven from God,
[11] Having the glory of God: and her light was like unto a stone most precious, even like a jasper stone, clear as crystal;
[12] And had a wall great and high, and had
twelve gates, and at the gates twelve angels, and names written thereon,
which are the names of the twelve tribes of the children of Israel:
[13] On the east three gates; on the north three gates; on the south three gates; and on the west three gates.
[14] And the wall of the city had
twelve foundations, and in them the
names of the twelve apostles of the Lamb.
[15] And he that talked with me had
a golden reed to measure the city, and the gates thereof, and the wall thereof.
[16] And the city lieth foursquare, and the length is as large as the breadth: and
he measured the city with the reed, twelve thousand furlongs. The length and the breadth and the height of it are equal.
[17] And he measured the wall thereof,
an hundred and forty and four cubits, according to the measure of a man, that is, of the angel.
See? John measured the WHOLE CITY, to be 144! The city is not a physical city, but PEOPLE who were saved out of old testament (12 tribes) and new testament (12 apostles) but together they are ONE CITY, ONE BRIDE, ONE JERUSALEM, ONE OLIVE TREE, ONE CONGREGATION, and ONE HOLY NATION.
That put the idea about God having two salvation programs. One with the Jews only as 144,000 while the great multitudes being the Gentiles only. Bad doctrine, I am telling you!