I concede the argument that Chinese are mistreated by Japanese because I am not Chinese myself so I have not experienced it, therefore I cannot confirm or negate your claim.
All I know for myself is that the Japanese I have met in all my life have been peaceful and nice people who have no desire to kill people or who look back on WW2 with pride and would think, "I would like to have been a part of that, it's a pity we lost."
As for my real life experience, my Japanese roommate's a real nice guy. I'm sorry if you have been insulted before, and I can't comment on it simply because it's never happened to me before. Something interesting to note is that apparently the Japanese don't view Taiwanese as "Chinese" otherwise we would have felt insulted too, though I haven't felt it.
Regarding nationalism, I don't think there's anything wrong with being proud of your country, as long as it isn't because you're smearing another country.
Regarding the Taiwan issue...
In truth no party wants to retake China. The current ruling party is the DPP (Democratic Progressive Party) which is the party President Chen belongs to, and it is slanted towards Independence, whereas the main opposition party is the KMT (Kuomintang, essentially Party of the People) which slants towards unification.
However, the KMT had a tight dictatorship over Taiwan for most of Taiwan's history, the phrases "Take back China" were from the KMT government era, though they have changed that since they've lost power.
It appears I cross posted with the one above me... I'll add my two cents.
As you said, WW2 doesn't have much to do with the people of Japan in the present. I agree that they should be taught an unbiased version of history, that is something Japan must work on, but it is not something that the Chinese people should hape Japan as a whole for.
The shrine was not completely dedicated to war criminals obviously. There are war criminals in the Vietnam War memorial, if I go there to pay my respects to soldiers does that mean I also paid respects to the war criminals to? If you want to make me look bad yes you can say that but I think that's not the main point.
My point regarding conflicts Japan and China have been involved in vor the past 60 years is to say that Japan of today is nowhere like Japan of WW2, you simply cannot compare them anymore.
I did not mean to compare the wars, I just wanted to point out that today they are more peaceful than China has been for the past 60 years, that's all, and that we should focus on the present Japan and not the one that committed crimes in WW2. Yes, and I emphasize again that the textbook should more accurately reflect history, but that's another story.
Regarding Japan promoting nationalism... I see nothing wrong with that, as they aren't promoting militarism (as China is... somewhat). You don't see the pics of rows and rows and Japanese bombers or missiles aimed at another country do you? Much less displayed proudly.
My point isn't to say that China is bad and Japan is good, it is that Japan has changed profoundly since WW2 and people should notice that and take it all in before condemning blindly.
And since I think I'm the one who really brought this off-topic, I apologize once again because this seems to be a pretty sensitive topic that is definitely political and has no place in this forum... (Don't wanna get banned) so I'll try to make this my last post on this topic... anyone who wants to debate oh my views regarding Japan-China should PM me unless we want to make Gollevainen mad...