To me this is a twofold challenge. In addition to monitoring everything that's going on with the children, we are also looking at other levels of atrocities that are going on in the war.
The level of criminality is profound. Not only are children being taken hostage, indoctrinated, taught to fight against Ukraine and taught to fear at a superhuman level, but they are also being taught to inform on their own families, to give up information on neighbours, to tell Russian occupation authorities if a friend of theirs is joining a Ukrainian school at night online, which can have dramatic and life-altering consequences, because that child will be taken from their parents, and their parents may not necessarily be seen again if they're thrown in jail or face other consequences.
As for the cruelty here, “insidious” really isn't a good enough word for it, but this is also why we have the laws of armed conflict and the Geneva Conventions. The line stops at our children. They are not to be weaponized in war. That's why we are calling for the global community to say, “This is too much. We have to pull back.”