中国の反日デモ

Don't worry about that. There is a reason why the Japanese government do that. The CCP exaggerate the history (or partly tell lies). The people have no way to get the information, because the CCP hide them. I personally like the Chinese people, but I don't like the Chinese government. Its policy "love China, hate Japan" is the biggest problem.

The CCP regime will collapse soon. Then the Chinese people will know them and the relationship between China and Japan will be better than now. Just do let it be.

For example, foreign professor studied so called "Nanjing massacre". His view is different from both Chinese and Japanese studies.
http://www.japanfocus.org/article.asp?id=109

You can see the opinion from the world here, although I don't like BBC.
http://news.bbc.co.uk/2/hi/talking_point/4436425.stm