5 All this is evidence that God’s judgment is right, and as a result you will be counted worthy of the kingdom of God, for which you are suffering.

Read 2 Thessalonians 1:5 Using Other Translations

Which is a manifest token of the righteous judgment of God, that ye may be counted worthy of the kingdom of God, for which ye also suffer:
This is evidence of the righteous judgment of God, that you may be considered worthy of the kingdom of God, for which you are also suffering--
And God will use this persecution to show his justice and to make you worthy of his Kingdom, for which you are suffering.