Then you've got to talk to your professor. There isn't anything kidish about knowing when a person/situation is bad for you and your health, and the people around you, and doing something about it. You could ask the professor to have him moved to another group or have him work solo. Obviously you're in a lose-lose situation no matter how you deal with him; better to talk to the professor and have him seething across the room or something than baiting you to your face.

Though, if you really feel you can't talk to your professor, is there any way you could have your interaction online? Or split into groups among your group so you don't have to deal with him every class, or at least all of each class? Hot potato him amongst yourselves. Split the tasks you need to do and rotate who has to work with him, maybe even give him something to do separately from the rest of you.