I'm surprised that you're surprised. Even ignoring Blizzard game players who don't follow the news, and ignoring (presumably Chinese) players that actually support the Chinese government over the Hong Kong protest movement, some percent of players are going to react by saying, "I don't agree with what Blizzard did, but I still like playing Overwatch/Hearthstone/Warcraft."
FWIW: Am a Masters league Starcraft 2 player and haven't wanted to log in since this news.
I'm sure there are people who "don't want politics in video games", but it seems like this kind of complete moral indifference is about the bar you have to hit to not be upset about this at the moment.
(And I don't find tonight's explanation sufficient.)
Here's my real account saying: I'm continuing to play Overwatch. The Overwatch developers aren't responsible for this mess. And I'm trying to get good enough to make it to at least the semi-pro level, which means taking time off for all of this to blow over and people to forget means I'm severely hampering my efforts to achieve that goal. (even a week off is going to harm my gameplay disproportionately) I can't just play something else, other games aren't interesting enough to me to try and make it to a high level of play.
I can only hope that Blizzard somehow unwedges the shoe from their mouth that they're madly chewing on and figure out some way to handle things better.
Yes, one of them said something like "go on and say those eight words then", referring to the slogan that Blitzchung then said while wearing the mask, and both were generally sounding amused.
However, it appears they had no idea he was showing up to the interview in a gas mask. Production for the event could have told them -- or simply canceled the interview any time after realizing -- and didn't. So the casters had to improvise, it's not fair to blame them as if they shared intent, rather than just wanting to keep a surprising live situation light-hearted and on the rails.