ANYWAY
surprise surprise someone can have different reactions to different things, one child dying as a result of the parents thinking they're doing the right thing =/= serial killing and genocide in my mind, maybe it does in yours.. but OKAY
OK, but you don't actually "personally find it a bit dumb to find someone criminally responsible when they thought they were doing the right thing." You find it a bit dumb to find these particular people criminally responsible when they thought they were doing the right thing.
Or, more generally, you're only going to apply this train of thought to people who are relatively close to your moral and cultural sensibilities. Which was what I was pointing out in my original response to you, if you want to ignore the intentionally extreme example I used.