This raises another question: parker's obviously an intelligent guy. Let's say he reads this and says, wow, some of the shit I've been doing is fucked up. What should he do about it?
Perhaps do some reading. There are plenty of resources both online and offline to learn about unpacking and examining your own white privilege and unconscious/conscious racist attitudes. Starkey's Links for Clueless White People is a good way to start. Coffeeandink over on LJ also has a ton of links and resources. You/Jeff Parker can read every single thing that was written during RaceFail '09 over on LJ; rydra_wong on LJ keeps massive linkspam posts under her "gcadod" tag.
I'd personally like Jeff Parker to perhaps look at why he's writing characters of color the way he does, realize that it's patronizing, troublesome, and offensive, and simply stop doing it.