Why Americans hate Chinese?

This is a very broad question. There are many levels of answers. If you ask if a typical American would hate a typical Chinese citizen, the answer would be no. There are many Americans with very different political/personal views. Americans from different parts of the United States have a huge difference in terms of their views and mentality.

Many people that lost their job due to cheap Chinese labor cost is probably not very fond of China or Chinese people. in addition, people that oppose to the way that the Chinese government handles business will not have a favorable view of the country.

Then there's the undeniable fact that white supremacy does exist. Asians (includes chinese, Korean, japanese, etc) have been in America for a very long time. Unlike other immigrants from European countries, Asians are never true part of the society. They took up the hypenated lable, "chinese-american", "korean-american", instead of just American.