QUOTE
There is no "scientific orthodoxy". That is just the point of science. Everything is open to question and attack. Theories are born ridiculed, some gain wide acceptance, and often die ridiculed. There is no cosmic answer key. It is only the wide acceptance (by knowledgeable people by the way) that determines "truth" in any age.
UNQUOTE

Which is why the loudest deniers usually have the flavour of (uneducated) religious fanatics. "Faith" only goes so far in Science - even the Aussies who got the Nobel Prize for their ground breaking work on stomach ulcers who had faith in their concept got nowhere (even being ridiculed) till their work was easily repeated by others _ I have just found a doctor who accepted this treatment and my desire to undergo it and my 30 year old ulcers have been relieved.

QUOTE
The opposition is almost exclusively non-knowledgeable; not necessarily stupid or evil, but certainly outside of their field of training and experience, or holding a very large political or financial stake in the outcome of the debate.
UNQUOTE

As in the twin Towers (and countless other) conspiracies... sigh ...