"...should this evidence not also be discussed?"
Surely a quote worthy of Ahmadinejad himself.
Those local and minor fluctuations are indeed weighed and discussed ad nauseum by the people doing the real climate work, like NAS. It's a topic not meaningfully illuminated by burnt-out sci-fi authors and the like who'll snap up any factoid that supports a predetermined position.
It's reminiscent the Iranian president's Holocaust denial, or the work of the Tobacco Research Institute. Nobody believes their carp, not for a minute, but if their "debate" can forestall action against their clients, they've succeeded. The goal is no longer to win, but rather to not lose - simply to continue the play as long as possible.

We would be better off if we could discuss ideas related to global warming without fear of being branded as evil for asking a question.

Sure, NASAguy, let's stop referring the old and obvious questions to realclimate.org, and flog that donkey ourselves.

I know I'm no expert on the subject, and apparently that simple truth is not an advantage that I share with others here.

That can be done on various forums (randi's skeptics forum, several general science fora, realclimate blog comment thread).

However, if one just chooses to spam the fallacies that have been shot down by several peer-review papers (like most 'debaters' on the issue choose to do), then one only need to look in the mirror for the reasons on being branded as evil, moron and just plain stupid.

The actual scientific debate about effects, magnitudes, processes, models, forecasts, history, causes, etc. continues as ever in science forums, conferences and papers.

I don't think that has gone anywhere and hopefully never will. That's what science is about.

But wholesale unscientific rebuttal based on cherry picking of evidence is getting really tiresome.