He associates blacks with the scum of the city. They're the ones who egg his car, who rob the stores, who stand in the bad parts of town and menace people. Whenever a black person walks by, he stares at them. He always seems uncomfortable with the black guy who sits with the Wizard and them. AND the passenger in the cab who seems to inspire him is disgusted that his wife is up there with a "n*gger", and Travis seems to be sympathetic to a degree.

I definitely thought he was a racist, because he associated black people with the scum in the city that he wanted washed away.