I don't care if the cartoon is racist, because it isn't funny. It's typically republican humor. Pick something bad that just happpened and associate it with something you don't like. It's like the humor gene is missing. The basic elements of joke structure are there, but the artist doesn't actually understand what a joke is.
I could do the same cartoon and say "The republicans need a new Chairman of the Republican national party". It would be equally unfunny and equally racist."