Ford is not running on an overtly racist platform or race-based policies. He does, however, have a tendency to use every racial epithet under the sun and people who support him either aren't aware of it or choose not to make anything of it. Their arguments tend to be 'well, everyone's a little bit racist' (so it's okay for Ford, hey, he's not perfect, etc.) or 'Hey, I'm no racist - I make fun of everyone equally! So does Ford!'.
People don't support Ford based on his statements about different groups, which come out of him almost as if he doesn't realize what he's saying is offensive.