This action from Japan, was just a calculated reaction by Japan towards China having extended its territory 'just so'.
As i have heard, some 'Cowpens' already made contact with this chinese idea of dealing with the rest of the world?
After Mao, the Tiananmen massacre
http://en.wikipedia.org/wiki/Tiananm...otests_of_1989
and what followed, i do not think any insult towards China would be too much, or diplomatically incorrect
Of course we have to behave, since China produces so much goods like Apple iPhones, or invested so heavily in western bonds, companies and territory