Oh, really! It all starts with parenting. It would be more interesting to read the public records of the divorce (as mentioned earlier) to see if the typical lawyer garbage is evident resulting of parental alienation by the mother (typically self absorbed legal justification of tyranical justice against the father whether justified or not).
But we know it works both ways and is still not an excuse for his behavior.
True psychopathy has absolutely nothing to due with parenting.