I think at least some of the animosity is from Blizzard refusing to take a harsher stance against outright hatespeech on their platforms compared to the treatment this Hearthstone player got.
Though, they aren't considering the nature of his statement, if some Overwatch champ was being interviewed after OWL and said "I hate n-words" he'd be unpersoned so much more thoroughly than this guy.
Also, most of Blizzard's terrible writing is based at least in part around the struggle of small groups of freedom fighters against overwhelming totalitarian odds.
The Omnic Wars might as well be a ham-fisted allegory for HKs struggle for independence