The "retarded" leftist definition of racism can be boiled down to treating people differently based on their race, which is what you do. Instead of taking each person as an individual and judging them by their individual merits, when you see a black man, you determine based on the colour of his skin that he is not as good as you. But, gee, thanks for recognizing at least that he's human. For someone like you that must be quite the leap.
Even if there were something to this whole race / IQ business, there is no way for you to tell based on skin tone alone whether or not the specific person you're talking to is more or less intelligent than you are.
You're just a garden variety racist, buttercup; either own it or discard it.