Since Japanese people come from China, why are they hostile towards China?

Question:

Answer:

We did not come from China.
Most probably, majority of Japanese ancestors came from Mongolia long before the Jomon Period.
I don't deny Mongolians were mixed with Chinese and Koreans before they reached Japan more than 20,000-30,000 years ago to say the least.
But, seriously, don't you think that many of Mongolians and the Japanese look so close each other that you cannot tell the difference between them?