Well, yeah, because the Hitler Youth were absolutely victims of nazism. Now, if he'd taken out an SS command post (or the leadership most responsible for perverting the kids) that would be one thing, but to shoot 70 unarmed kids is something else entirely.
I did not know that it was a labor party camp - I had heard that he did not like the islamic immigration into his country and I was baffled by how he thought shooting up a summer camp would somehow stop the situation. I just assumed insane people do insane things and little would be learned by reading anything he wrote; so, thank you for your explanation.
This is news to me, too.
I would not call Hitler Jugend victims. I actually met a former Jugend in Germany, and he regarded it as the high point of his life. He still had his old party card, and is proud of a picture of him as a boy getting one of the numerous awards the HJ handed out.
Many of them were the last defenders of Berlin against the Russians, killing many before they in turn were slaughtered. The Russian attitude to them was the same as for the SS: to be killed on sight.
The purpose of such training camps is not activities, but memorization and recitation of political doctrine. Those who are best at this are promoted. Freedom of thought, questioning of doctrine, or any form of argument are strongly discouraged. All activities are group activities, be it exercising, eating, sleeping. Individualism is the enemy.
Doctrine always defeats common sense, experience, or caring for others. Lying to achieve doctrinal goals is encouraged. A sense of ruthlessness pervades.