He gave you negative feedback simply for distrusting him ? I don't know the history between you 2 but kind of agree that it's messed up.
Also what impact does the trust/distrust hold other than being able to see more clearly the people who get tagged by them ? Is there something else that I'm missing ?
He is suddenly bothered because some one in my trust list has given him a negative rating previously, and since I have recently rejoined the default trust list, this is now visible on his account. He doesn't understand how any of this works. You might want to read this thread for further context:
https://bitcointalk.org/index.php?topic=5182530.0