Paul told the church of Thessalonica to not be troubled.
Paul also told them that they would be given rest from their persecutions and God would repay their persecutors with tribulation
when Jesus came. Not before he came, not when they died, but
When he Came:
2 Thess 1:4-10
4 so that we ourselves boast of you among the churches of God for your patience and faith in all your persecutions and tribulations that you endure, 5
which is manifest evidence of the righteous judgment of God, that you may be counted worthy of the kingdom of God, for which you also suffer; 6 since
it is a righteous thing with God
to repay with tribulation those who trouble you,7 and to give you who are troubled rest with us when the Lord Jesus is revealed from heaven with His mighty angels, 8 in flaming fire taking vengeance on those who do not know God, and on those who do not obey the gospel of our Lord Jesus Christ. 9 These shall be punished with everlasting destruction from the presence of the Lord and from the glory of His power, 10 when He comes, in that Day, to be glorified in His saints and to be admired among all those who believe, because our testimony among you was believed.
If He didn't come to them and give them the rest He promised them, and repay their persecutors with tribulation as he promised He would,
then the only conclusion we can come to is that the people from the 1st century Thessalonian church
are STILL TODAY suffering in their persecution at the hands of their persecutors, and those who were persecuting them
were never repaid with tribulation, as Paul promised them they would be.