I saw this controversy go down and I think we need to really look at what he is saying before we off handedly characterize him as a big douchetard.
1) Is there a single person on this forum who doesn't have a complaint about gamers as a group? Too sexist? Too gung-ho? Too critical? Not critical enough? How many times have you ever been called a flaming fucking faggot because someone captured the digital flag you were guarding? His comment that "gamers are the worst fucking people" came as a response to people directly telling him they would pirate his game because they don't like him. Guess what? Those people are fuckers, and I think he can call them out without being a douche.
2) We can argue about this all day, but there is plenty to support the case that modern Japanese games are not particularly good on the whole. There are exceptions of course, but there is evidence for this position. I will simply link to Japan's own Keiji Inafune on that topic: http://www.wired.com/gamelife/2012/04/keiji-inafune-qa/
Quote: "Across the world, American games are the best-selling and considered the most fun. But Japan’s gamers and game creators still won’t accept this. This is why Japan can’t win."
Granted not everyone in Japan agrees with him, but to harbor an intense dislike of Phil Fish as a person over two pretty justified public quips seems a little disingenuous.