That description is the essence of Liberalism. The boy called himself a Nihilist! The Nihilist movement was the intellectual precursor to Communism!
After the assassination of Tsar Alexander II in 1881, the Nihilists were known throughout Europe as proponents of the use of violence in order to bring about political change.
He is a Leftist!
His ramblings are incoherent, he’s psychotic, incapable of any meaningful understanding of any philosophical point of view, leftist or otherwise. He may have regurgitated some left wing nonsense, but the overarching chaotic nature of his diatribes was psychotic parroting of random disconnected bits and pieces.