Roseanne was referring to 1 person.
It's the outrage crowd that makes it about a whole race again, so it is the outrage crowd who are the actual racists because they take her remark, and slap it onto a whole race. Extreme generalization.
Look at this guy, he looks like a choir boy and an ostridge had a baby:
Am i racist to all white people now?
Look at this actress, she look like Mr. Potato Head and an anteater had a baby:
Am i racist to all asians now?