Did you know Blacks are 13% of the population? There should be many more whites because there are so many more. Should I go slower?
Well duh. But if single parent kids are the problem sheer numbers are what count. Unless, going back to my earlier assertion, you think single parent white kids are obviously better than single parent black kids (why - because of their skin colour?) So yep you're still coming across as racist.
But do try writing slower - some thought might creep into your prose.