If that's real, that's a surprisingly bad PR move from Blizzard. I understand this was targeted at a Chinese audience (since Weibo) but they must have known this would get back to their English speaking audience almost immediately. There has to be a better balance then "We will always respect and defend the pride of our country" (even if that is a slight mistranslation).
Indeed - did Blizzard staff post this willingly or was this posted on Blizzard's Weibo account via Weibo staff or even someone else who followed an order? They certainly want to make the Blizzard game fans fall in line thinking Blizzard is aligning with China's tyrants' orders.
They've given no indication they've changed their mind on this matter, so it seems kind of premature to assume someone else has taken control over their account. The Weibo statement is consistent with their public position.
If they want to show fans that their stance on this matter has changed, they should unban Blitzchung, give him back his prize money, and rehire the interviewers they fired.