Rabih Badr’s father has a point, an Islamic point.

“The indemnity for the death or injury of a woman is one-half the indemnity paid for a man. The indemnity paid for a Jew or Christian is one-third the indemnity paid for a Muslim. The indemnity paid for a Zoroastrian is one-fifteenth that of a Muslim.” — Reliance of the Traveller, a classic manual of Islamic sacred law (o4.9)

“Thus if [a] Muslim commits adultery his punishment is 100 lashes, the shaving of his head, and one year of banishment. But if the man is not a Muslim and commits adultery with a Muslim woman his penalty is execution. … Similarly if a Muslim deliberately murders another Muslim he falls under the law of retaliation and must by law be put to death by the next of kin. But if a non-Muslim who dies at the hand of a Muslim has by lifelong habit been a non-Muslim, the penalty of death is not valid. Instead the Muslim murderer must pay a fine and be punished with the lash. … Since Islam regards non-Muslims as on a lower level of belief and conviction, if a Muslim kills a non-Muslim, then his punishment must not be the retaliatory death, since the faith and conviction he possesses is loftier than that of the man slain…Again, the penalties of a non-Muslim guilty of fornication with a Muslim woman are augmented because, in addition to the crime against morality, social duty and religion, he has committed sacrilege, in that he has disgraced a Muslim and thereby cast scorn upon the Muslims in general, and so must be executed. … Islam and its peoples must be above the infidels, and never permit non-Muslims to acquire lordship over them.” — Sultanhussein Tabandeh, A Muslim Commentary on the Universal Declaration of Human Rights

“Father of convicted murderer: ‘Marianne was not worthy of him,'” translated from “Vater von verurteiltem Mörder: ‘Marianne war seiner nicht würdig,'” UnserTirol 24, January 15, 2020 (thanks to Searchlight Germany):