Maybe he forgot that the Congress he's so proud to be a member of, voted to put that committee in place and approved it to ask all these questions.
He might not have voted in favor, but hey, them's the breaks. He still has to obey the majority, just as Republicans had to for fifty-plus years.
I don't recall Republicans throwing the kind of temper tantrum he did, all those fifty-plus years.
Sounds like he's not used to be in a minority position in the House. Well, sorry. Someone's got to be. and he's elected to be it.
He can always resign if he doesn't like it.