At least so far Google does not have a proven history of illegal behavior in support of a monopoly.

Hmm. Cooperating with Chinese authorities on filtering search results qualifies in my book. This isn't like Coke criticizing Pepsi, it's like AT&T criticizing Verizon, or vice versa. Google is fighting for the same piece of the pie that MSFT is. Neither one is sweetness and light, and for GOOG to paint itself as the champion of openness and transparency is - as someone else noted - hypocrisy.