My husband is/was going through a similiar situation on the job with a guy on his job. Everyone there knows he is a Christian, so he knows he is being even more carefully watched (though we are always been watched, even when we don't know it). This guy always yells and fusses when he feels stuff is not done the way he wants it to be done, but he doesn't always fully explain what he wants and often times it doesn't make sense (at least that what DH and at least half the people on his job say). Well, the guy got into it with him over the phone one day and my husband started giving him the Word. The people on his job was suprised, and told me at the next company gathering, that they had never seen anyone respond to the guy like that. They said my husband didn't yell or fuss, but just told him that he had an anger problem that he needed to deal with, and gave him scriptures. Well, the guy ended up emailing DH an apology for how he behaved and admitted that he was wrong.
My husband had been praying over this thing for a while, b/c he said that he noticed how this guy dealt with things on the job years before this more recent situation. So the only advice, I could give you is to pray about it and be the salt/light on the job. You know Daddy is going to take care of you, inspite of what others may say, and he will like Pam Pam say make your enemies your footstool.
