Read the UN statute on war crimes and genocide and call your lawyer as soon as he graduates from law school.
For the purpose of this Statute, ‘war crimes’ means:
Grave breaches of the Geneva Conventions of 12 August 1949, namely, any of the following acts against persons or property protected under the provisions of the relevant Geneva Convention:
Wilful killing Hamas, Oct 7, yes.
Torture or inhuman treatment, including biological experiments; Hamas, Oct 7, yes--necrophilic rape, genital mutilation, amputations using Hebrew language instructions in Arabic letters: "spread your legs, lie down, take off your clothes".
Wilfully causing great suffering, or serious injury to body or health; Hamas: live streaming killing to victims' relatives using their phones
Extensive destruction and appropriation of property, not justified by military necessity and carried out unlawfully and wantonly; Hamas and Gazan civilians' plunder of Kibbutzim.
Wilfully depriving a prisoner of war or other protected person of the rights of fair and regular trial;
Unlawful deportation or transfer or unlawful confinement; Hamas: hostage taking
Taking of hostages. Hamas: ongoing
https://www.un.org/en/genocideprevention/war-crimes.shtml
Hamas is guilty of violating this statute since it intended no military advantage, only to kill civilians:
"Intentionally launching an attack in the knowledge that such attack will cause incidental loss of life or injury to civilians or damage to civilian objects or widespread, long-term and severe damage to the natural environment which would be clearly excessive in relation to the concrete and direct overall military advantage anticipated;
Note the term "undefended". A hospital with weapons becomes an armory, a school with a terrorist holding an RPG is no longer "undefended" and loses its protected status. That's UN statutory law.
"Attacking or bombarding, by whatever means, towns, villages, dwellings or buildings which are undefended and which are not military objectives;"