Like I said, not enough info. You can shout power trip or agent was a moron of course.
But I'd like to hear more details about the line of questioning. He just says it was really ridiculous, which I can empathise with as noone enjoys a secondary examination at the border, but all he says in interview that he was asked about his employment in Germany and how he supports himself Which is hardly ridiculous. Then there is legitimatly frustrating sounding statements about the agent asking him repeatedly about his Bruins ticket and not "getting it".
So.. what else happened over 4 hours.. because that's like a 5 min exchange at most.
I don't know if the interview was edited or what, but basically two separate times they ask him what the reason US CBP gave him for the questioning and/or refusal was and he doesn't elaborate and just says he had enough and went back to Canada.
Maybe they didn't tell him. Maybe it was just as goofy as it seemed. Maybe it was something administrative later like it was a problem with the visa waiver . Maybe it was something else Tobias didn't share.
Anyway, whatever.