You say it's propaganda. From everything I've seen, Chinese propaganda is much more crude and much more official than that. They don't force other people — like celebrities — what to say, they broadcast via state TV channels and they put up huge banners. They have censorship, which means forbidding certain things, but I've never seen them coercing celebrities to say things they don't agree with. In general people can choose to stay quiet and not get involved. Do you have evidence that shows that the celebrity statements are coerced? Again: this is not criticism, I am truly curious about your sources.
From what I understand, nationalism in China is real. Do you perhaps dispute this notion?