Sorry but post-game commentary is supposed to be about the game.
Doing this during the post-game commentary is not professional at all.
Now if they did all that due to actions outside of the game, then i would not support it at all.
But this, in the context of how/where it happened, it makes sense.
While the movement might be worth supporting and all (i have not read myself in on what is going on exactly), that was not the right place for it.
It also really forgets with the representation of Blizzard. If they did not do anything about it, Blizzard would be marked as a supporter for the movement, while it is better to keep yourself out of the whole conversation. What is Blizzard's role in this conversation, do they really have any responsibility to take their stance in this conversation?
Acting on it might show they do not support the movement, but i think this is just a breach of conduct. If it was due to actions outside of the game (and commentary), it would be more worrisome.
Also if we support that, what keeps people from sharing more controversial opinions?
We need to draw a line somewhere, and i think they did that for a good reason.