@Packingsoapandwater
I mean, what the hell are you if you can beat a three year old to death, when soldiers in 1916 from backgrounds where their dad took a belt to them on a regular basis couldn't even fire at the enemy?
That's the layer that's missing when we look at these cases
I won't respond with some of my issues with other assertions in your post, because they're largely semantic and not overly relevant to the thread, but I will try to respond to the quoted part at least.
I think the fundamental thing here is that the majority of your 1916 soldiers still had a strong internal morality, a sense of right and wrong, hence why they could happily volunteer to go and stand in a trench to defend what they cherished against the aggression of a morally inferior foe, yet they still couldn't rationalise shooting to kill what they also knew were ordinary human beings standing in the enemy trench across no-mans-land.
You have a dichotomy, where in the bigger picture it's 'the right thing to do', but simultaneously, on the other hand, and at a lower level, it's also hideously inhumane and entirely 'wrong'.
The problem with the people in the news of the last few days is they totally lack that strong internal morality. Yes, they know 'right from wrong' on a basic level, and I dare say that they are well aware that their actions are criminal, but they are not bound by their internal monologue they way that 1916's young men were because it simply isn't ingrained in them the same way, the fear of the consequences, and I'm not talking about prosecution or prison here, rather the actual outcome, the effects of their actions if you like i.e. injured and dead children, simply does not provoke the same emotional response of revulsion, self-loathing, and regret that was typical in soldiers who knew they had killed another young lad not at all unlike themselves.
The idea that they might directly be the cause of a child's death is no more consequential to them than 'meh'. That is not a normal response for a typical, well adjusted human being, so we have to ask ourselves difficult questions about how that individual has come to a point whereby they are atypical and abnormal, rather than just spewing nonsensical garbage about 'evil' etc. That's completely pointless, it serves no purpose and provides no worthwhile answers.