I think Jiro is concerned not with total karma but with some combination of (1) the effect on individual comments' reception of their having a negative score and (2) the effect on his reputation of lots of his comments being negatively rated. Of course the latter is going to correlate with total karma but it's more like total recent karma, and it seems like the short of thing readers could be affected by without explicitly noticing.
As to whether it's Nier/Azathoth/Ra again: I wouldn't be surprised, but I'm not sure "way more -1 than -2" is very strong evidence that one person is responsible for all the downvotes. It could equally be a few people who all dislike that sort of comment but don't think it's bad enough to bother downvoting them when they're already negative.
the effect on individual comments' reception of their having a negative score
An excellent opportunity for budding rationalists to practice resisting anchoring, I would think X-)
Richard Kennaway has posted about an edit war on the wiki. Richard, thank you.
Unfortunately, I've only used the wiki a little, and don't have a feeling for why the edit history for an article is inaccessible. Is the wiki broken or has someone found a way to hack it? Let it be known that hacking the wiki is something I'll ban for.
VoiceofRa, I'd like to know why you deleted Gleb's article. Presumably you have some reason for why you think it was unsatisfactory.
I'm also notifying tech in the hope of finding out what happened to the edit history.