I wouldn't call these people single issue voters. They distrust conservatives on almost all issues. Most are monogamous, pro-gun, small-government, low-taxers. They will never vote for conservatives (or the GOP) because of the perceived anti-science stance these groups continually take.
They didn't like Carter or Clinton, either thougth. About 60% voted for Kerry because they didn't trust Bush to be truthful. (There is a perception that Bush likes science that agrees with his policies; not that other presidents have been better.) The other 40% voted for Bush because they just didn't like Kerry.
I would still call them "single issue voters" because they evidently put most of their eggs in the pro/con evolution basket. To me it's about the same "scaling" as an feminist voter, pro-lifer, environmentalist, etc.
It seems everyone's got their buttons - but when taxes and spending are on the line those buttons can get mighty pricey. And when it's national security, the cost can be unbearable.