The best friend of a colleague is the mother of a child killed by his father in exactly this way some years ago. I have met the mother and her surviving child many times.
In this case, the father was looking after the boys - she was extracating herself from the relationship. She went out to work, he was in with the boys. In their tower block flat. 10th floor. He called her to come home. He waited. And then shortly before he knew she would be back, he threw one child off the balcony. Then the other. Then jumped, himself. The second child survived because his brother's body broke his fall - but has severe and permanent damage of many kinds.
It was the moct chilling example of exactly what Madamez talk of.
I don't think he was insane, but i think his degree of anger and possesiveness enveloped and deformed any feelings he had for his boys.
He deliberately timed it so that she would arrive back and see the carnage. In fact he included some horrible catch-22 ultimatum in his message calling her home, one that was impossible for her to meet.
The desire to hurt, to do damage, knows no bounds on occasions, it seems. I don't think he was insane. Made irrational by anger and vengeance and posessiveness - but is that insanity?
I think it is terrible that the woman in Crete has to sit metres away from her ex husband.