I haven't read a massive amount into this (a tournament winner mentioning about Hong Kong on the stream I think) but the fact that everyone is up in arms for something that Activision Blizzard have done isn't surprising at all.
Just read that he will now receive the prize money and have his suspension lowered to six months.
https://www.eurogamer.net/articles/2019-10-12-after-a-week-of-protests-blizzard-issues-statement-on-pro-hong-kong-hearthstone-player-ban
Still ott mind.