Forgiveness is the ultimatum for anyone to achieve. Loving unconditionally falls right next to it. In many cases when we see characteristics in others that we dislike we possess the very same traits. Who are we that we cannot forgive another who has wronged us when we have wronged others in the same capacity.
Even when our Lord was being crusified He asked His Father in Heaven to forgive them because they knew not what they were doing. Looking at ones intentions rather than the results of their acts can help us to better understand that there was no harm intended but only good will toward us.
Vengence is not ours to pursue when we have been intentionally wronged. We should pray that this individual to seek change and to depend on his God to show them the way