phil fish is a better person than 90% of the developers (and by extension, human beings) on this planet, just saying
I actually always felt like Fish was a little emotionally unstable (mostly from the movie - EDIT: I mean, I felt it cause of the movie, not that he's unstable cause of the movie ), and this led to his inability to handle criticism or generic internet shitstorms.
Anyway, IIRC he started really losing his temper and being rude after enduring plenty of shit. Then he also said some inappropriate stuff (like the Japanese devs thing) and all went awry.
But all in all, I always felt some empathy with him, as lots of times it seemed his words were received in a twisted and worse way than he actually meant. I don't like him for his smugness and pretentiousness (of his work too), but I can't say I hate him at all.
Reading around the PA case, it seems way different. Like, people asking them infos about updates after months of silence, and they answering rude shit - a thing that of course, as usual, escalates pretty quickly.
And on top of this, I must say that if you tell your customers to follow you on Twitter for updates about your game, and then you start tweeting inappropriate stuff... I mean, it's still your personal account, ok, but is - and I'm sorry to reiterate this argument again and again, but I think it's really important - waaaaay unprofessional.