What is Islam's view on how to deal with the mistakes of others, and is forgiveness and tolerance of the wrongdoer—even if the mistake is repeated by him—considered weakness, humiliation, and disgrace, or is it better?

Forgiveness is a great virtue encouraged by Islamic law. It is better than exacting one's rights, but it is not always commendable. It may be a sign of weakness and humiliation in some situations. If forgiveness leads to corruption or a violation of God's sanctities, then it is not commendable; in fact, its absence may become obligatory. Commendable forgiveness increases a Muslim's honor, and it must be sought for the sake of God's pleasure, not in anticipation of people's praise. Furthermore, a Muslim is not permitted to abandon his brother for more than three days.