But then the apostle continues here to show us the righteous judgement of God. It is the exercise of his absolute perfect justice, ‘to recompense tribulation to them that trouble you.
So for us it is to love our enemies. ‘Therefore if thy enemy hunger, feed him; if he thirst, give him drink.’ But for God in due time in the day of judgement there will be retribution for all who have persecuted the Lord and his people.