When a man's ways please the Lord, he maketh even his enemies to be at peace with him, Pr 16:7. Kings' hearts are in his hands, and when he pleases, he can turn them to favour his people. It is not wrong to stand upon our guard in dealing with those who have acted unfairly.
But Isaac did not insist on the unkindnesses they had done him; he freely entered into friendship with them. Religion teaches us to be neighbourly, and, as much as in us lies, to live peaceable with all men.
Providence smiled upon what Isaac did; God blessed his labours.