Nof Erez didn't say that a formal Hannibal order was issued, he described that it was chaotic and there was a breakdown of command and mass firing at vehicles carrying suspected militants. This doesn't mean that the Hannibal directive was activated (even though it's been rescinded). The colonel was also retired, he wasn't a part of any command structure at the time. He was giving his opinion and interpretation of the chaos, which isn't conclusive of anything but his commentary.
None of your quotes establishes just how many Israelis were killed by friendly fire, or that the Hannibal Order was invoked to target a considerable number of civilians, or that friendly fire caused a significant portion of deaths.
There remains zero evidence that the major proportion of deaths was caused by friendly fire. There is zero evidence that the Hannibal directive was widely reinstated on the 7th of October. There was probably friendly fire during urban skirmishes, given the environment and the lack of clear identification of who was who, but again, there is no evidence of systemic civilian friendly fire (there is evidence of some squad friendly fire, crossfire, but nothing on the scale of helicopters and heavy ammunition deliberately targeting civilians)