An offense against the law of nations is in general, to either perpetrate by too many, or injure too many, to be managed, as a practical matter, through the ordinary processes of the criminal justice system. It is to direct, or through action or inaction, encourage the deprivation of rights of one group or individuals by another.For Islamic nations we can identify several offenses that particularly apply:
How many perpetrators, or victims, are enough to take us from the criminal justice system to prosecution as an offense against the law of nations? For the perpetrators it can be as few as five, to avoid having the perpetrators testify in defense of one another. For the victims, it can also be as few as five, too many to prove an offense by particular offenders.
For such cases we can treat the offenders or the victims as a class. If we can prove offense of the first, or victimhood of the second, we can treat the offenders collectively, convict them, and punish them. The usual penalty is death.
Piracy or brigandage.
Invasion or conquest, especially violent. This can consist of one person entering a nation, without consent.
Enslavement.
Intentional environmental damage, (such as the salting of the fields of the Carthaginians by the Romans after the Punic Wars, or the destruction of the waterworks sustaining the marshes north of Baghdad by the Mongols in 1258).
Oppression of women:
bazr, or female genital mutilation.
Requiring women to marry, especially very young ones.
Preventing women from controlling the number and timing of their children.
Preventing divorce by women.
Requiring wearing or headscarf or hijab by women.
Requiring wearing of excessively concealing clothing by women, such as burqas.
Restricting inheritance by women.
Forbidding women to work in certain jobs, or exercise certain freedoms.
Nonjudicial punishment, such as a lynch mob, driven by incitement.
Preventing speakers from being heard, which can be incitement.
Destruction of habitats, hunting of species to extinction.
Intimidation of business owners to paying a percentage of earnings, extortion, “protection”.
Selling or conveying of dangerous, perhaps addictive and mind-altering substances.
Shaming or threatening of nonconformists into changing their beliefs or behavior, especially “religious”.
Resisting or obstructing of compliance with legitimate treaties or laws, sedition.
Defamation of groups by untrue accusations.
Oppressive and unreasonable surveillance.
Disclosure of legitimate state secrets by righteous states.
Marketing or persuasion on untrue information, propaganda.
Destruction of evidence of things past, of past writings, relics, and accomplishments.
Controlling of identification needed to freely function.