It's a partisan issue because politicians have taken it up and made a cause out of it, and any proposal for dealing with the issue that I've ever heard involves either greater regulation, increased taxation, or both.
Whenever either side adopts a position on a given issue, the issue tends to become polarized. People will take a stand based on their political philosophy, not upon the facts.
While somewhat reasonably stated, the wording of your question reveals these same biases in you. You said "discounting the fact that so many conservatives are scientific illiterates" - where do you come off making a claim like that? How far up your own backside do you have to be to actually believe nonsense like that? In addition, you go on to say "do they really like being controlled by unelected industtrialists with no concern for their well being or anyone elses?", when a similar claim can be made against progressives who really like being controlled by elected officials and their appointees who are driving an economic agenda disguised as science.
What your question completely ignores is that a large segment, if not a majority of those questioning AGW do so not as deniers, but as skeptics, who demand evidence, not consensus, of AGW before economic or regulatory legislation is enacted upon.