Nonperson wrote:
I know some people who apologize when they've obviously done nothing wrong and it makes me mad. It's like they are accusing me of being so unreasonable as to think they've done something wrong when they haven't.
Why are you assuming that they think you unreasonably think they have done something wrong? The simpler, more immediate assumption to make is that they simply think, or are worried, that they've done something wrong. Perhaps they are insecure.