No. It's stupid and decadent, but like the idiots who wore swastikas in the early punk days, stupid as their "statements" were, it is a sign of freedom.
Wearing a dress like this is China is a positive sign.
She and whomever she is associated with are actually much greater forces for good in China than the people who would say she has no brains or are aghast at it or want to attack her.
Sorry, but she did this for attention and nothing more. She wasn't making a political statement. Even if she were, it's hard to argue that the statement could be construed as positive given the level of atrocities comitted against the Chinese people (not government, but people) by the Japanese.