> doesn't make sense on a logical level. The commenter was a) comparing two rates (incarceration rate of minorities) between countries by providing their ratio

> doesn't make sense on a logical level. The commenter was a) comparing two rates (incarceration rate of minorities) between countries by providing their ratio, and then furthermore b) providing an additional related piece of information, namely an absolute level in one of those countries. Perfectly sound, logically and all.