I just left this comment at John Graham-Cumming's blog. The Neo-Nazi revisionist bit refers to his use of the term "denier", which is always contemptible. The bit I've bolded is the important point:
Noise and uncertainty simply exist, for scientists and laity alike (comparing Freeman Dyson to a Neo-Nazi revisionist is unworthy of you). Pretending certainty that does not exist is not scientific, though it is the province of the fanatic.
People you call sceptics - a term of approval in a sane world - are not trading in obfuscation, but rather in terms of broad, sweeping issues. Without proxies, we can't reconstruct the historical record. Without a good measured temperature record, we can't calibrate proxies. We do not have a good directly-measured temperature record. This is not some niggly detail.
UPDATE: It looks as though jgc does not want to publish this comment. It's not on his site yet, though a later comment from someone else has appeared. Going out to bat for climate milleniarism does unfortunate things to people.