It may be worth remembering that as the children of Eve and Adam, we are bound to err. It's something of a proclivity, with us. 

God claims justice for his own. That doesn't mean we have no part in it, but it does appear to be a special province of the Lord. Jesus seems rather to encourage us to practice mercy, the forgiveness of trespasses. Not withstanding His encouragement over the past few thousand years, one might well have the impression that mercy continues to be the weaker suit amongst us.  If I must err, I'd rather it be in that direction.

I have known, and been, a number of sorts of fool. The fool I repent of, and fear for, the most, is the one animated by a spirit of harsh judgement, intoxicated with certainties in matters where the last word must always be God's.  That person has never "won" an argument, and has certainly never persuaded another of his love, let alone God's love.