That's true and Tom wasn't denying that... he was (and I am) refuting the correlation you made between Christianity and Creationism.
Creationism is not a tenet of Christianity per se and has nothing to do with Jesus Christ per se. It's a (relatively) modern invention of "scholars" who think the bible is literal in it's descriptions of how God made heaven and earth... It's the seven days issue. I would venture that most christians are not creationists.
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To put an answer to Lion's question, such things are important if you believe that the person being elected is going to base other decisions and propose legislation based on his beliefs, rather than knowledge.
It's the basic problem that I see with Bush. He acts on what he believes to be true regardless of evidence. So if something isn't a proven given, he seems more than willing to ignore the "preponderance" of evidence and will go with his ill-informed gut.
We end up not supporting the Kyoto accords.
Limited stem cell research.
An ill-advised war.
An ongoing attempt to overturn Roe v. Wade with regard to abortion rights.
Those who espouse to be on the far left or the far right rarely have a lot of compromise in them, in my opinion. And as Tom points out, if the candidate is more willing to be guided by belief than information, that's what we end up with. Right now we're suffering with the conservative side of that. I'd be no happier with the liberal equivalent.