This quote from Bishop Robert Barron extends the message on why humanity tends to lean towards hate and radicalism and doomed to repeat. 

“Friends, after Jesus names his twelve apostles in today’s Gospel, he heals a multitude of people. And that multitude represents us, for we all stand in need of the Savior’s healing touch.

We are made for love and connection and justice and nonviolence, but at every turn and in every way we are twisted in the direction of hatred, separation, injustice, and violence. We are, as St. Augustine put it, wandering in the land of dissimilitude and in the grip of the libido dominandi. The contemporary philosopher Rene Girard has reminded us that all of our social arrangements are marked by scapegoating and oppression.

The human race is best characterized as a dysfunctional spiritual family, all of us having been marked from birth by the effects of sin. Sin has found its way into every aspect of human life, personally and institutionally. We would be hopelessly naïve to think otherwise. And so we need, not just a philosopher or social theorist or political activist or military hero, but a Savior, someone who can break into our dysfunction from the outside and heal us.” From, Bishop Robert Barron