Quite a large amount of people have little empathy. Someone getting blown up somewhere else is a them problem. "I've never been blown up, they must have done something wrong to deserve it (I have heard things like this come out of peoples mouths)". Now, quite often those same people with little empathy have their own children therefore have an empathetic connection to the theoretical victim allowing them to contemplate the terror those children experienced. This allows the situation to be much more viceral to them. Also, pedophila is an act that is highly stimtized in most places in the world so the social shame and disgust phenomenon also applies.