I wonder how this situation with DufchBat fits in with Warren v, District of Columbia?
It’s a famous US Supreme Court case where law enforcement were shown to have no specify duty to protect the public.
It's a highly complicated matter.
Civil Law (a variant of which is used in the Netherlands and most of continental Europe) does know a so called "everyman's duty" to intervene against clear and present threats to a legally protected good (such as human life).
The degree to which that duty lies on a person depends on their personal abilities and the circumstances of the case. For example, the law does not expect of a non-swimmer to try and save a drowning person. It might expect of a decent swimmer to try and save a drowning person, unless they're excused by an important reason (textbook example: a child in their care cannot be left alone). But it does demand that, say, a trained lifeguard or swimming champion goes into that water, simply because of their skillset.
Failure to comply could constitute the offence of denial of assistance; and, under extreme circumstances, even the felony of murder through passivity.
Accordingly, the question of liability in the present case hinges on whether or not Dutchbat had a reasonable and reasonably obvious chance of repelling the Serbs.
It remains a fact those soldiers had been ordered not to intervene, though. Disobedience is a criminal offence. Generally speaking, under Civil Law philosophy one law may not expect of you that you violate another. There is however the dilemma clause; much like one's allowed to break the law in order to defend oneself, one is also excused with regards to any offence the commission of which is necessary to avert the aforesaid threat.
In a nutshell this means that
if Dutchbat had a reasonable chance of averting the massacre regardless of orders,
and if their commander had to be aware of this, then and only then would the duty to intervene have had been upon their shoulders.
Curiously enough, even the recent court ruling seems not to have been able to give a definite answer. I think there is none.