As long as the US continue to support Israel no matter they do, the world can do very little.
You have no idea or whatsoever about what's a war, what's targetting, what's casualties and what's war crime at all.
Destroying civilian infrastructure is a war crime under the Geneva Convention.
Also,
*The indiscriminate or disproportionate use of force
*Collective punishment for the acts of a few
*Targeting civilians (do you seriously believe Israel doesn't target civilians?)
are war crimes under the Geneva Convention.
Causality my ***.
From Human Rights Watch..
https://www.hrw.org/news/2014/06/09/israel-killing-children-apparent-war-crime
Also, did you hear Israeli Deputy Prime Minister saying “We Must Blow Gaza Back to the Middle Ages Destroying All the Infrastructure Including Roads and Water”, this saying itself only is an intention of war crime.
Just other few examples for you..
List of international laws Israel have broken
• Violation of the right of the Palestinian people to self-determination as codified in Res. 1514 (XV) and 2625 (XXV), and recognized by the ICJ in its decision on the Wall.
• Violation of customary law, human rights norms (A/RES/194/III, § 11 and customary IHL as codified by the ICRC in 2005, Rule 132, International Covenant on Civil and Political Rights Art. 12(2)) by prohibiting the return of Palestinian refugees to their homes.
• Violation of the Security Council (UNSC) Resolutions requiring Israel to withdraw from the Occupied Territory (87 resolutions to this day) and the UN Charter which obliges the Member States to “carry out the decisions of the Security Council” (Art. 25).
• Violation of “[…] the principle of the inadmissibility of the acquisition of territory by war” (UNSC Res. 242), as well as the Security Council Resolutions condemning the annexation of Jerusalem.3
• Violation of the Palestinian people’s right to their natural resources and wealth through the Israeli use of Palestinian agricultural land, the exploitation of Palestinian water reserves and preventing Palestinian access to more than 10% of their safe drinking water reserves (A/RES/64/292).
• Violation of international humanitarian law prohibiting:
• the establishment of Israeli settlements (4th 1949 Geneva Convention (GC), Art. 49 and 147), the expulsions of Palestinians from their territory (id.);
• the demolitions and expropriations of Arab houses and lands situated in the occupied country (1907 Hague Regulations, Art. 46 and 55);
• mistreatment, torture and prolonged administrative detention of Palestinians in Israeli prisons (4th GC, Art. 3, 32 and 78);
• non-compliance with the right of return of Palestinian refugees to their homes (A/RES/194/III, § 11 and customary IHL as codified by the International Committee of the Red Cross (ICRC) in 2005, Rule 132);
• military attacks against civilians, indiscriminate and disproportionate attacks against Gaza and Palestinian refugees camps (customary international humanitarian law, ICRC Compendium Rules 1 and 14);
• collective punishment of the Palestinian population of Gaza, where the World Health Organization reports that life will not be sustainable by the year 2020 (Art. 33, GC);
• the terms articulated by the 2004 ICJ decision on the Wall.
• Violation of fundamental rights and freedoms such as freedom of movement, freedom of religion, right to work, to health, to education because of the Israeli Wall and check-points in the Occupied Territory which prevent Palestinian free access to their work place, school, health services and religious places (1966 Covenant on Civil and Political Rights, Art. 12 and 18; id. on Economic, Social and Cultural Rights, Art. 6, 12, 13).
• Violation of the prohibition of discrimination based on national origin through Israeli policies and practices akin to Apartheid (2011 Cape Town findings of this Tribunal), which have denied Palestinians a functioning nationality both within Israel proper as well as the Occupied Territory and beyond.
Among these violations of international law, several of them are criminally sanctioned: war crimes,4 crimes against humanity,5 and the crime of Apartheid.6 Because of their systematic, numerous, flagrant and, sometimes, criminal character, these violations are of a particularly high gravity.
The US is also accompanying and supporting Israel in many things and cases.
• By enabling and financing Israel’s violations of international humanitarian and human rights norms, the US is guilty of complicity in international wrongful acts per Article 16 of the International Law Commission’s Draft Articles on Responsibility of States and therefore also responsible for the violations endured by the Palestinian people as well as the affront to the international system;
• By obstructing accountability for violations of the Geneva Conventions, the US has failed to meet its obligations as a High Contracting Party per Common Article 1;
• In continuing to provide economic support for settlement expansion despite occasional expressions of disapproval, the US is also in violation of the International Court of Justice’s jurisprudence, particularly paragraph 163(D) in its decision on the Wall;
• By stonewalling an international resolution to the conflict by abusing its veto power within the Security Council and its political/economic/diplomatic clout in the General Assembly, the US is in violation of several provisions of the UN Charter, in particular Article 24;
• By failing to condition military aid to Israel based on its compliance with human rights norms and strict adherence to the law of self-defense, the US is in violation of its own domestic law.
for sake of argument.
