GEN1449 Rambam [Maimonides] writes, “When a man commits a sin against another, the victim should not hate the sinner in his heart and keep silent, as the verse says concerning evildoers, ‘And Avshalom did not speak to Amnon a single word, neither good nor bad, for Avshalom hated Amnon’ Samuel 1 13:22.   Instead, it is a mitzvah to notify him of his sin and tell him, “Why did you do such and such to me, and why did you sin by committing this transgression?’ As the verse [Leviticus 19:17] says, “Surely rebuke your fellow man” Rambam, Laws of De’os 6:6.   … “Anger is better than laughter” Eccelesiastes 7:3.   Metzudos Dovid explains the meaning of this verse: “If a person commits a sin against another and the latter expresses his anger, this is preferable to his feigning friendliness. Expressing one’s anger has the effect of quelling that anger; the heart will become tranquil and the wronged party will not look for revenge. Conversely, if one feigns impartiality without forgiving, the feelings of anger will remain buried in his heart – when the opportunity arises, he will not have mercy and will take revenge.” WAGS 61-62