humm... I'm sorry to hear that. That really is unfortunate.
I, myself, have been known to be unintentionally negative. A few months back, I think I made someone mad at me here on the discussion forums, and to this day, I'm still not sure why. (they've since left). And maybe a couple of other encounters too. But it was never my intention.
And in my very first encounter on WikiTree, someone called me "stupid" for a merge request I proposed. It took me days to respond back. I tried very hard to be as courteous as I could, admit my mistakes where I could see them, but still call him out for the uncalled for rudeness.
But overall, I still try to see the best in people - even if I still don't like them :)
But you're right, it still should not be an excuse. I just see two sides to the same coin.