Opposition to the Vietnam War was his triggering motivation .
Stoltenberg 's first steps into politics came in his early teens , when he was influenced by his sister Camilla , who at the time was a member of the then Marxist -- Leninist group Red Youth .
Opposition to the Vietnam War was Stoltenberg 's triggering motivation .
Stoltenberg 's first steps into politics came in his early teens , when he was influenced by his sister Camilla , who at the time was a member of the then Marxist -- Leninist group Red Youth .