I agree with some of what you said. However, I don't agree that most Chinese people see Japanese people and British people as crazy. In my opinion, China is so strong because the Chinese mindset is one of the pragmatic in the world. I agree that most Chinese people despise the Empire of Japan and Japanese ultranationalists, but based on what I've seen, most of us don't project those feelings onto contemporary Japanese people. When the Manchu people conquered China in the 1600s, millions of people died. They then imposed their hairstyle on the Chinese people for hundreds of years. Are contemporary Manchu people seen as crazy because of that? No! In fact, one of the most popular symbols of Chinese patriotism today is Wu Jing, a Manchu person. Are Mongolian people distrusted in modern China? Again, the answer is no. Instead of wrongfully encouraging hatred against modern Japan and modern Britain, Chinese society is focusing its energy on the most pragmatic course of action, strengthening its military and ensuring that China cannot be conquered again. In my opinion, such hatred is a huge waste of time and energy. Just look at India. Just go to any forum populated by Indians. Their hatred of Muslim people and Chinese people is immeasurable. It is almost like a part-time job for many of them. In 2023, the Mughal Empire is still a mainstream topic in India. That's absolutely absurd to me! All of the time and energy spent indulging in that hatred is completely wasted and is probably one of the reasons why India's leaders can control their people like puppets.
On the other hand, I have never met a Korean person who hasn't said something bad about Japan in public. Koreans suffered under Japanese occupation, but let's be honest, their suffering was no worse than ours. If anything, our suffering was much worse. I dated a Japanese girl in the past. I didn't care about her ethnicity at all. I only saw her as a cute Asian girl whose company I enjoyed. One day, my Korean friend told me "I can't see myself dating a Japanese girl because I'm Korean. I hate them." Another time, another Korean friend of mine yelled "f**k Japan" during a World Cup match. When I asked him why, he said "I hate Japan because I am a nationalist." To them, hating Japan (and now China), seems to be as natural as breathing, but honestly, I don't think they have many reasons to hate modern Japanese people. It is as if their brains are corrupted by hatred. Like I said, I don't know a single Chinese person who acts like this. That makes me so proud to be Chinese. In my opinion, the pragmatism of the Chinese people is one of the main reasons why China is so strong in 2023.
