Is the Anger Seen at McCain/Palin Rallies Racist?

When John McCain and Sarah Palin began their personally attacks against Obama, they unleashed a torrent of invective that surprised even them. They have tried, not always successfully, to reign in their audiences.

My question is how much of the visceral invective at these events is motivated by racism and the fear of having America's first black president elected in a little over 3 weeks. I bring in evidence the following photoshopped picture which appeared on the right wing online message board "The Free Republic."
Caption: Shoeshine Boy
The picture appears among the subscribers reaction to a discussion on the possibility of McCain getting some post in an Obama administration. The picture is accompanied with the text, "Back at ya, Obama. Palin has a job for you as well when she is in the white house:". The poster goes by the name "spodefly," and while his posting privileges seem to have been revoked, The Free Republic has yet to take down this piece of racist garbage as of this writing.

Other postings on the web site a full of lies and smears that seem to be creeping into McCain and Palin's rhetoric and advertisements.

I do not believe that Sen. John McCain or Sarah Palin are racists, but they bear some responsibility for feeding the hatred of racists who support them.