Comment by dijit

No, booby trapping is really clear:

"Rule 80. The use of booby-traps which are in any way attached to or associated with objects or persons entitled to special protection under international humanitarian law or with objects that are likely to attract civilians is prohibited."

Examples of protected objects are childrens toys or medical supplies bearing the insignia of the red cross; but if you want further reading: See, the military manuals of Belgium (ibid., § 32), France (ibid., § 39) and Germany (ibid., § 43) - hard to read without translations though.

Examples of protected persons include, of course, doctors who wear the red-cross insignia. However it's also a war-crime to wear this insignia and act in the interests of any power exclusively, or operate as a combatant. - so, owning military equipment that is given out by the high command of a terror organisation would immediately disqualify you, and if you survived the blast you would be facing a tribunal.

However, Booby-traps which are used in a way not prohibited by the current rule are still subject to the general rules on the conduct of hostilities, in particular the principle of distinction (see Rules 1 and 7- linked below) and the principle of proportionality (see Rule 14). In addition, the rule that all feasible precautions must be taken to avoid, and in any event to minimize, incidental loss of civilian life, injury to civilians and damage to civilian objects (see Rule 15) must also be respected.

But proportionality is in play if you do not fall below the NATO recommended 4:1 combatant:civilian ratio. Which it seems Israel didn't.

Rule 1: https://ihl-databases.icrc.org/en/customary-ihl/v1/rule1

Rule 7: https://ihl-databases.icrc.org/en/customary-ihl/v1/rule7

Rule 14: https://ihl-databases.icrc.org/en/customary-ihl/v1/rule14

Military Manuals: https://ihl-databases.icrc.org/en/customary-ihl/src/iimima

Sources: https://ihl-databases.icrc.org/en/customary-ihl/sources