These things happen in war. It's inevitable that civilians will be killed. A combat zone is a dangerous place for everyone who's there. That's one of the reasons war is so stupid and why wars of aggression, such as the invasion of a sovereign nation which hadn't first made war against us, should be avoided at all costs.
In parts of the U.S., it's considered normal for civilians to carry firearms in public. I think it's stupid, but that's just the way it is. If those parts of the U.S. where packing firearms is acceptable were to become combat zones, gun-toting civilians would be killed by the hypothetical invading armed forces.
Killing civilians in war is wrong, period, yet they die by the thousands and tens of thousands. Do the world's leaders care? They cared once upon a time, but not anymore. Wiping out entire populations via unethical and immoral "rules of war" has been the
status quo ante since the 1700s. The genocide perpetrated against Native American Indians springs to mind. Killing non-combatants was the norm in ancient times as well, which you can plainly see by reading the Old Testament of the Bible. There was an imperfect hiatus on the deliberate killing of civilians in war, which lasted for about 1500 years.
Then capitalists discovered lots of money could be made via manufacture of military equipment, rental of transportation systems, etc. Soon politicians and heads of state were seeing things in a different light. Money talks. One needs lots of bombs and aircraft to destroy cities and their civilian populations. The owners of Avro, which manufactured the Lancaster heavy bomber during the Second World War, didn't end up in the poor house. Most of the aircrews ended up dead, though.
As is always the case, if blame for wrongdoing is to be allocated it will be focused upon those with the least power. None of the scumbags at the Pentagon or in federal government who wrote leaky rules of engagement or bamboozling policies justifying torture will ever be brought to justice. Plenty of low-ranking military personnel will bear that burden, as they bear the burden of carrying out the folly which is war. The capitalists will laugh all the way to the bank.
=^..^=