Chilled Already
I think the personal aspect has already peaked. As is often a case between rational people it was due more to misunderstanding each others views than real antagonism. I think it is also clear that neither one of us thinks credential siting should be a routine part of the debate.
I agree 100 % with your "tone" critique of Zubrin. I have said that was it's primary fault from day one.
Regards,
Mark