To punish sons for their fathers' crimes is restricted only to those who accept and welcome their fathers' wrongdoings so that they would inherit such usurped properties. To punish such sons is a reproach that discourages the wrongdoers from aggressions out of their care for their dear sons. It is also a good tiding for the oppressed individuals that their oppressors will be punished eventually.
The Prophet (s) said: "For anyone who begins his day without having the intent to oppress anybody, Allah will forgive his sins -that he committed against his Lord-."
Forms of Injustice
(1) Self-Wronging
Self-wronging is the negligence of the obedience to God. Therein, disappointment and humility will be the result:
I swear) By the soul and that (Power) which designed it and inspired it with knowledge of evil and piety, those who purify their souls will certainly have everlasting happiness and those who corrupt their souls will certainly be deprived (of happiness) (91:10)."
(2) Injustice towards the Family
Injustice towards the family occurs when the paterfamilias neglects to apply the true Islamic education to them, overlooks to guide them to virtue, uses excessive severity and violence, and prevents them from having the necessities of good livelihood. Such matters cause material and ethical shortcomings to the family members.
(3) Injustice towards the Relatives
This form of injustice occurs when the relatives are deserted, disappointed in misfortunes, and deprived of feelings of kindness. Such matters bring about enmity and disregard of relations.