If a neo-Nazi group wanted to foment antisemitism on Mudcat the best step they could take would be to fund "Martin" (Ron Davies up the thread.)

That possibility has often occurred to me. I don't mean the funding bit, but the possibility that when the man has said that the whole character is just a fake, intended to annoy people, he might have actually been speaking the truth. No way of knowing one way or the other. But the effect is the same either way.
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That article by Michael Neumann that someone linked to earlier is worth reading. It approaches a lot of the issues involved from an unusual angle.