He presented himself in the context of his engineering role to make a political statement. That violates Google's own policies. That same policy says they would

He presented himself in the context of his engineering role to make a political statement. That violates Google's own policies. That same policy says they wouldn't have fired him if the context had been one where he was presenting himself as a "civilian" not an employee. Getting himself fired was something he knew would be part of this protest.