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In Joan's blog post, she says:
"I think it's a fair question, to ask why I'm more disturbed by Obama's more vicious supporters than Clinton's. I'll give it some more thought."
Then, in a response in the letters section, she answers herself when she says:
"clearly nasty Clinton supporters...don't get under my skin as much as the nasty Obama zealots (aside from the reason that's obvious to the nasty Obama zealots, which is that I support Clinton!)"
Maybe she thought she was being snarky or sarcastic, but clearly, here, unlike in her blog post about how impartial she is, she's actually telling the truth.