How about a nice, polite phone call (or a dozen or so from ALL of us) asking if he's the gentleman who drives the red suv? When he replies, "Yes", say that's too bad. I could have used your services, but after you call me, or my friend, a b!tch, I don't think I can use your services. Bicycles have every right to the road, and until you learn the laws of the road, we'll have to boycott your business. And, we'll do what we can to make sure every cyclist in the area knows how you feel about sharing the road with them.

Keep it nice and sweet. That usually bothers people more than anger.