Online groups incite young people to sadism: is every child susceptible to that? Five questions for an expert

The Eindhoven man who is behind an online group that incites young people to commit violence against random victims is a low point in a bizarre spiral of violence among young people. How do you become such a sadist, how do you recognize it as a parent when your child goes in this direction and how is it possible that these types of trends seem to be getting worse? Jan Derksen, emeritus professor of clinical psychology and psychotherapy, answers.

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