I have to agree with Bermuda's assessment of the incapable supervisor. These people work for a small company job in a small town and nothing delivers a bigger message in the gossip mill of a small town than the person in charge taking control, putting his big boy pants on, and delivering a big message "that bullying at his company when he is paying these people to do a job will not be tolerated ever" and if he comes across anymore of it they will be suspended without pay, let go, etc. Watch how fast the atmosphere in that job changes. I come from a very small town and word travels through town super fast. Otherwise, this company will continue to get more people who feel it is okay to continue the same behavior and do the same over and over again. This of course is just my point of view but it seems pretty clear cut to me.
I'm sorry Nettie I know that this does not help you very much right now, and I hope your employer will see the light on how to correct this issue promptly. You are in my thoughts, and I do hope that somehow you can lighten your stress load and find some inner peace.