That's just like saying how is the Japanese people of today resposible for what happened in China over 50 years ago. Expescially considering that the Japanese people back then and the Japanese people now are almost completely different values. But you still get plenty of chinese people despising Japanese simply for being Japanese, but you also have Chinese people who love Japan and people who don't care at all. Just say people will be people. Isn't a country mostly identified by it's government anyways? So when people make these comments they are probably talking about the government and not an individual person.