The article does mention that twitter is blocked in China, and therefore that the social media storm is most likely not genuine.
You can't control whether someone is offended.
You can control whether you fire someone because someone else is offended.
This is the GP I am replying to. I don’t believe the employee should have been fired.
http://www.paulgraham.com/say.html
"The statements that make people mad are the ones they worry might be believed."
At present, the idea that California might be returned to Mexico or that all non-native-Americans might be kicked out of America is sufficiently ridiculous that nobody will take you seriously. Thus, there's no reason to get offended. You can say whatever you want, you're just a nutcase.
That China gets mad whenever you suggest that Tibet become its own country or when you mention Tiananmen Square indicates that it worries its citizens might actually take you seriously...
I don’t think PG really knows what he is talking about with respect to Tibet China relations if he thinks that analogy holds...
But do you really think it is so unrealistic that many Americans would be offended by such a statement? Let’s not pretend it is somehow surprising that people might be very insulted by being told what they consider part of their country should be returned, especially by foreigners.