Before you leap to a conclusion based on the facts take a little time to run through just how many alternatives might be true.  "When you have eliminated the probable the improbable must be true" and that is a marvellous quote to bring you down to Earth.  It reveals that what we find is that a full investigation more often than not reveals the improbable; the things we discounted at the start based on a quick scan of the facts as we saw them.

When you feel a strong emotion in the work-place just remember - very few people actually get a kick out of upsetting others and when they do it is usually as a result of something done to them.  You have to break the spiral by getting and evaluating how to react thinking as if you were an onlooker,  someone independent just looking at the evidence and giving good advice...what would they tell you to do.