Why do hurt people hurt people?

Why Hurt People Hurt People
https://josephmattera.org/why-hurt-people-hurt-people/

Why do hurt people hurt people?
https://www.quora.com/Why-do-hurt-people-hurt-people

Hurt People Hurt People
https://www.psychologytoday.com/gb/blog/hurt-people-hurt-people

Hurt People Hurt People
https://medium.com/personal-growth/hurt-people-hurt-people-64b900b4b382