They probably will. Mongols were just as bad or worse. Chinese forgot about them. I've read in history book that in China during Yuan dynasty, Mongols enslaved Han tribe and made Han tribe female obtain permission to marry. To obtain this permission, bride had to lose virginity to a Mongol warrior. That's totally wrong. Mongols were very racist. Did Chinese wipe them out during Ming dynasty? no. Mongols were very lowly populated. Once they lost their empire, they could have been wiped out and they are still existing on earth.
Emperor Akihito visited Nanjing and not one person threw a tomato, egg, or a rock(food is precious in China so you can imagine throwing a rock). I know, Chinese government forbade people of Nanjing to not insult the emperor but I mean wouldn't it be normal if somebody did throw something at emperor for the massacre in Nanjing?
My point is not that Chinese should not forget or should forget. Society is always being challenged with new issues brought up it's very hard to keep up with history and all.
google and wikipedia