Yep, they're saying it's because he's black. Nevermind that Powell has supported administrations that are as white as white can be.
From Rush:
"I am now researching his past endorsements to see if I can find all the inexperienced, very liberal, white candidates he has endorsed. I'll let you know what I come up with."
From Michelle Malkin:
One last note: I see in comments that many believe Powell supports Obama because he is black. Powell has said electing a black president would be ?electrifying.? He is a staunch supporter of government racial preferences.
It?s a mistake, though, to attribute Powell?s endorsement primarily to some kind of race loyalty.
It?s Obama?s social liberalism, not his skin color, that attracts Powell most.
So, it's not his race... it's his crazy racial liberalism. Got it.
And in Maine:
Writing on the conservative message board As Maine Goes, Republican attorney Dan Billings responded to Colin Powell's endorsement of Barack Obama today by accusing him of racism and stating that "If Obama was a white man, Powell would not have made the endorsement."

Re: Powell's endorsement
I really feel for Powell. The man has been a loyal-as-hell Republican for ages, feted by the Republicans as proof that our party can attract African-American supporters, and celebrated as proof that an AA can get ahead in the Repub party by being talented, highly intelligent, and competent, but a single endorsement of a Democrat has completely shattered his Republican creds amongst the far right and now he's treated as though he's too stupid to vote on any issue other than race.
Not that I'm at all surprised by this reaction.
That must be because you don't see color.