I don't think I could express something close to the truth without expending a whole, whole lot of words. The differences in how we view life and what matters in life are vast.
In how we view power, social responsibility, basic human kindness, or ... deja view, I feel like I have posted this before. No sarcasm, feels weird man!
The Mainland of China is also very diverse being a large and storied country, there are all types of people, many bad, many good, many just going by in life... in some ways they get a few rules of life we are trying to forget, but in others, well to say there are problems is being kind in my opinion.
The below is just my feelings, not grounded in as of yet verifiable knowledge:
As for sadism, that is a whole other topic. We all have sadism inside of us, and Chinese, Japanese, and Korean cultures through various stories, ideas, and idioms are easier to be "in touch" with cruelty. Whether we mean state torture or S&M, the human, or perhaps animal reasons these impulses exist are better understood, for better or worse... maybe worse, I'm not sure.
That is my theory anyway from a long, long line of experience, take for what it is worth.