Doing business isn't the problem. The problem is that Google is creating a censored version of their search engine. Rather than simply turning a blind eye to China's abuses, they're actively helping the communist party perpetuate those abuses.

Additionally, your flippant dismissal of "silly hypotheticals" is particularly misplaced. Maybe read about some of the things they've done to the Falun Gong and what occurred at Tiananmen square. These aren't small abuses that can be overlooked, and no American company should be complicit in helping the Chinese government keep these things quiet.