The way I see it you have four roads to take. Each one with their own pros and cons. 1. Be the jerk. This will unfortunately mean that you will sacrifice any

The way I see it you have four roads to take. Each one with their own pros and cons. 1. Be the jerk. This will unfortunately mean that you will sacrifice any high moral ground (imao) you might have over the jerk since you have now stooped to his level. To quote a certain alien from a certain movie: "This is getting out of hand. Now there are two of them." 2. Take the high road. This will avoid conflict but also will not resolve the source problem which might resurface again but it might just be someone elses problem 3. Take it up with him. Do it in private. Calmly and respectfully. Don't tell him he is being a jerk. Have a conversation about it. The difference? Ask him "do you think that was approriate?" Instead of "stop being a jerk" etc. Try to use language that doesn't put them on the defensive (very hard to do I admit) 4. Kick the problem upstairs. Talk to his superior/hr and tell them about the situation. They will handle it for you (or not). However when management gets involved, stakes go higher for all parties involved (including you being the "snitch").