> Engaging in any act that, in Blizzard’s sole discretion, brings you into public disrepute, offends a portion or group of the public, or otherwise damages Blizzard image will result in removal from Grandmasters and reduction of the player’s prize total to $0 USD, in addition to other remedies which may be provided for under the Handbook and Blizzard’s Website Terms.
The rule is not "political speech is not allowed" it's "don't make us look bad."
Choosing to ban this player is absolutely picking a side, and it's not with the good guys.