>> Yes there is collateral damage because Hamas uses civilians as human shields, so we have no choice but to kill them too, but we do not specifically target them.
I struggle to believe this is really a comment by a "commander in the IDF". Such a person should know that the use of civilians as human shields by one side does not absolve the other side from taking every precaution to minimise harm coming to those civilians.
Risk to civilians does not bar military action, but the principle of proportionality requires that precautions be taken to minimize the harm to these protected persons. This analysis includes considerations like whether circumstances permit the attacker to time a military action to minimize the presence of civilians at the location.[16]
https://en.wikipedia.org/wiki/Human_shield_(law)#Legal_doctr...
Specifically, saying the IDF doesn't target them, they're just in the way, is a cynical denial of that responsibility.
Further, a commander of the IDF would remember the proverb about throwing stones when living in a glass house: there is extensive documentation of the use of Palestinian civilians as human shields by the IDF. See for example the Goldstone Report on Operation Cast Lead (2009):
10. The use of Palestinian civilians as human shields
55. The Mission investigated four incidents in which Israeli forces coerced Palestinian civilian
men at gun point to take part in house searches during the military operations (Chapter XIV).
The Palestinian men were blindfolded and handcuffed as they were forced to enter houses ahead
of the Israeli soldiers. In one of the incidents, Israeli forces repeatedly forced a man to enter a
house in which Palestinian combatants were hiding. Published testimonies of Israeli soldiers who
took part in the military operations confirm the continued use of this practice, in spite of clear
orders from Israel’s High Court to the armed forces to put an end to it and repeated public
assurances from the armed forces that the practice had been discontinued. The Mission
concludes that this practice amounts to the use of Palestinian civilians as human shields and is
therefore prohibited by international humanitarian law.
https://image.guardian.co.uk/sys-files/Guardian/documents/20... (page 19 of the pdf).
Despite Israel's claims Hamas does not use civilians in this way. Instead they fight from built-up areas and make it difficult to distinguish combatant from non-combatant. They "hide among civilians" but they don't "use them as shields".