I have read the official Israeli statement/rebuttal of this. They claim they fired on the crowd to prevent looting from occuring. They claim that any injuries and deaths are a result of the stampede.
It is obvious to anyone watching what the reality is: Israel deliberately starves Palestinian civilians, cutting off aid supplies (we have seen video evidence of aid trucks being detained and/or sent back). When food aid finally does get in and starving humans behave as starving humans do, Israel attacks them claiming they were looting.
Only an absolute braindead moron would take the Israeli statement at face value.