" The only way to understand the reason behind someone's hurtful behaviour is -

Understanding that every action is driven by an underlying emotion. Emotions especially the negative one's are our reactions to the conflict between our beliefs and reality.

The influence of these negative emotions, causes us to act in ways that hurt others.

So if someone hurts you, it actually indicates
that they have an unsatisfied need or a wound
that needs attention. "

― Wordions