That's a bit... ad-hominum. Maybe I'm mis-reading it, but for me it parsed more or less as "I'm not saying you're a racist, but people who say what you're saying are racists...."
If that interpretation is wrong, please do correct me.
I'd like it if arguments could stand on their own, not be dismissed because someone falls into a particular category.
>I have a dream that my four little children will one day live in a nation where they will not be judged by the color of their skin, but by the content of their character.
and all that.