And people with A but not B wouldn’t suggest anything more than very tentatively anyway. Or at least shouldn’t.
Picking up on something said earlier, when did understanding become excusing anyway? It’s quite medieval thinking to say because something is horrific it isn’t worth understanding how it could have happened*. Also that awareness won’t change what happened but it
might lead to a potentially similar situation not happening again.
*though it is worth saying that is unlikely to be something the public will ever know in detail, and there does come a point when that curiosity becomes gruesome in itself. True crime porn sort of thing. They’ll probably be a mini series at some point