The theory is that an increase in X causes an increase in Y. You've pointed out cases that have a high X and low Y as counterpoints. But in order to make the point you're making you need to provide evidence that increases in X have not lead to increases in Y, so we can control for initial X.

Back to cancer, heavy smokers who did not develop cancer are an example of some X for which X->Y is false. Like you said, you would need to take a random sample of cases and see whether Y correlates with X against a control group.

You introduced the concept of Asian countries having lower rates of social unrest, and I have never said this is related to race at all. Perhaps you are reading into the genetic confound in the cancer example, but it was just intended as an example of a confound within the analogy. There are plenty of differences between life in these countries and elsewhere that can act as confounds.