Then they would have unhypocrytically continued to use them only defensively. Can you explain exactly how Google is being hypocritical in this case?
So they are hypocritical because of something they haven't done? By that logic, everyone is an hypocrite.
Has Google ever actually sued competitors aggressively? Not that I know of.
On the other hand, Apple and Microsoft are /already/ having an impact on Android and these patents would only strengthen them- their motivation was offensive and they were the ones who inflated the prices just to hurt Google.