I actually have to disagree with this, even though saying that "all blacks are good runners" or "all asians are good at math" or "all mexicans are great at landscaping" even though there may have a positive connotation to these statements, they are still stereotyping. Stereotypes can be both positive and negative but aren't necessarily accurate.
Are all black people good runner? Are all Asians good at math? Maybe some are, but not all.
you said, "Racism is the belief that one race is superior to another. It has nothing to do with abilities."
All those things are abilities people might have, so it has to do with what you said as well as categorizing people based on a races sterotypical abilities, it is still racism
politics....1