It is true that the tribal records were lost when the Romans destroyed Jerusalem in 70 A.D. But that does not mean that God lost the tribal records. Remember, the 144,000 Jews are not selected by Jewish authorities in Jerusalem or elsewhere. They have been selected BY GOD.
These 144,000 are not the church, nor are they Gentiles. These are Jews from each tribe.
They are being sealed for Protection from God when He judges the world.
We always must remember that God is not through with the nation of Israel. Yes, they failed in their mission to be a witness nation in the O.T., this will not be the case during the great tribulation period. These 144,000 Jews will preach the Gospel under the most severe circumstances and will bring in the greatest harvest of souls the world has ever known.
Right now, around the world our brothers and sisters are being persecuted for their faith. In all Muslim countries around the world, persecution is intensifying.
In this country, our Christian liberty is being taken away piece by piece. Before we fully understand what is going on, we will be marginalized, denounced, defamed, and decimated by the professing church.
Persecution will be the tool used by God to sift those who outwardly identify with Jesus. Remember, tares are mingled with the wheat. Jesus is giving us a closer look at this process in Matthew 24:10-13.