Why would the most disgusting criminal cry?

Anonymous
I've heard of a disgusting convict that stole, raped a couple college girls, cheated with his son's wife (and fathered the baby too), etc. He had no limits at all.

He was a real POS, all hardened, pure evil, nothing good in him. He even laughed at his crimes and wrongdoings, never showed remorse whatsoever. Suddenly when the priest (after he gave a short speech how childhood trauma is the reason for our current actions) asked him what his parents did, what terrible damage could they have done to him, what was it. The sick criminal got defensive so fast, yelled at him to leave and started crying... then shaking.

If that's an evil, sick criminal why did the priest's words got him? Why was he crying after that question?
Updates
+1 y
That POS went from his maniac laughter to getting defensive and breaking down like a little kid would after the priest asked a simple question. He couldn't answer it and cried.
Why would the most disgusting criminal cry?
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