I don't think anyone is saying that Jason isn't a great rider, or a guy who's willing to help others, but if you were there (and please refrain from guessing those who weren't) here are some facts:
1) Jason has an awesome run, but so did Jeremy and Eric. (FACT)
2) Jason wasn't at his best - he had a better run last year when he gave Eric something to be seriously worried about. (IMHO - judge for yourself when you see the vid)
3) Eric's run was flawed, but far outstripped the other two on sheer amplitude and difficulty (backflip - who can compete but for a few individuals?) (FACT)
4) Both Jeremy and Jason were much more enjoyable to watch - I'm sorry but Eric is getting dull, especially at the Nationals level when he doesn't show off his A-game. (IMHO, but crowd reaction suggested that others agreed)
5) Jason screwed his own run by pulling a sub after the end of his run and swamping his motor - screwing his chances at the double up. (FACT)
6) The organizers threw him a bone by allowing him to go back out for the double up. (FACT)
7) Both before, during and after the competition Jason showed very poor judgement and sportsmanship. (FACT)
Those are (mostly) facts, draw your own conclusions.