Harry, the concept of forgiveness is found in the Torah. Indeed, all religions speak of forgiveness.

If Xians want to be considered a loving and forgiving people then actions speak louder than words. As Chaim pointed out: 19 centuries compared to 1 -- and that 1 is 7 years old (the holocaust having occurred in the last century).
And everything that Sarah tells you, listen to her voice. Genesis, 21:12