Dude had some serious anger issues and psych problems. I don't know any of the details about the interactions with the kids, but back then I saw some rather deranged footage of the dude who was already suicidal, tempting fate and literally asking for his own demise. Even his fellow compatriots were like uhh... this dude's a little crazy.
Now WHY was he crazy. Was he just fed up as a hated gentle pedo? Was there something else going on there? I'd guess the latter, but I am open to being enlightened about him.
My understanding is he was a guy out for blood wherever he might find it, with nothing left to lose if it ended his own life. And he rolled those dice and got snake eyes.
Sucks to lose.