EDIT: More Israeli-source/Israeli-reported evidence below (excluding any non-Israeli analysis of evidence)
I just want to note one detail
> The "immense and complex quantity" statement here refers to why the army says it's morally sound to investigate the incidents.
The IDF says it is *not* morally sound to investigate the incidents
They have released their own data (without allowing third party investigation) on friendly fire for invasions after Oct 7, which they claim is 20% of casualties. They have not released evidence and refuse investigation of the casualties resulting from the "immense quantity" of "friendly fire" incidents on Oct 7.
> Almost a fifth of Israeli soldiers who died in Gaza were killed due to friendly fire, according to data released by the Israeli military, Israeli Ynet News reported on 12 December.
There is also IDF reporting on the use of helicopters:
> “The pilots realized that there was tremendous difficulty in distinguishing within the occupied outposts and settlements who was a terrorist and who was a soldier or civilian … The frequency of fire at the thousands of terrorists was enormous at the start, and only at a certain point did the pilots begin to slow their attacks and carefully choose the targets,” Israel’s Ynet reported last month, citing an Israeli air force investigation.
> “Shoot at everything,” one squadron leader reportedly told his men.
> A separate report published in Haaretz noted that the Israeli military was “compelled to request an aerial strike” against its own facility inside the Erez Crossing to Gaza “in order to repulse the terrorists” who had seized control. That base was filled with Israeli Civil Administration officers and soldiers at the time.
> According to Haaretz, the army was only able to restore control over Be’eri after admittedly “shelling” the homes of Israelis who had been taken captive. “The price was terrible: at least 112 Be’eri residents were killed,” the paper chronicled.
> Pilots have told Israeli media they scrambled to the battlefield without any intelligence, unable to differentiate between Hamas fighters and Israeli noncombatants, and yet determined to “empty the belly” of their war machines. “I find myself in a dilemma as to what to shoot at, because there are so many of them,” one Apache pilot commented.
And some Israeli witness accounts:
> An Israeli woman named Yasmin Porat confirmed in an interview with Israel Radio that the military “undoubtedly” killed numerous Israeli noncombatants during gun battles with Hamas militants on October 7. “They eliminated everyone, including the hostages,” she stated, referring to Israeli special forces.