"Soldiers don't usually get charged with murder for combat operations"
Yes and therein lies the problem, they should.
In many European countries at least you're not even supposed to fire until you've confirmed a target is an absolute threat - i.e. if it's fired at you and yes this puts your life at risk but you're a soldier and that's your job.
America's throwing out the window of the concept of "do not fire until fired upon" has been disastrous for it and the reason it frankly lost the Iraq invasion and has lost in Afghanistan (in both cases, the militants are still there in massive numbers with massive influence).
When you look at the collateral damage video for example you can see the Apache gunner's camera clearly states the range as over 1km from the targets, so there was literally no justification to pull the trigger under any circumstances - the Apache was out of RPG range, let alone effective RPG range and the people on the ground had not fired at any other US soldiers or shown any intention of doing so. The Apache pilots were given permission to fire regardless and what's the net effect? dead civilians, dead Americans and increased hatred for America and increased recruitment propaganda for the militants. The net effect? The militants get stronger and the Americans get weaker, which is why they've failed to achieve a victory in both Iraq and Afghanistan - because they put themselves above the law, above civilians and that makes them hated, and that makes them a target. The Apache video was one of many incidents of lack of punishment for clear violations of normally accepted engagement rules.
That is also why the likes of the Boston bombings occured, because as the culprits stated, they were recruited because they were sick of seeing civilians killed by America.
America desperately needs to start punishing it's soldiers properly when they fuck up, it needs to show occupied countries what justice means, it needs that more than anything else it will continue to be unable to win any war other than those against nation states with no post-victory occupation. That's not a military suited for modern day engagements though.
There are a number of interesting documentaries out there about places like Afghanistan where many times villagers say they want anything other than the Americans giving them protection because the Americas are too trigger happy, kill civilians and just make things worse and this lack of punishment for it's soldiers for having a lack of RoE discipline is at the absolute core of that. Hell, even some British soldiers have officially put forward concerns about going to war with America in the past because of the disproportionate number of blue on blue incidents caused by the Americans which go without proper punishment (see the incident of A10s strafing British soldiers and journalists in Iraq for example). If even your closest military ally has problems with you on the battlefield then something has to change.
I wont pretend it's even an entirely new problem though, it's the same reason America lost in Vietnam and went running with it's tail between it's legs from Lebanon and Somalia too - too quick to dehumanise the civilian population and treat them as vermin to which any act can be carried out without accountability leading to the civilian population doing the obvious thing - supporting their enemies instead.