I'd say they are as qualified as the democrats. The democrats are convinced and will vote for anything related to it. The republicans are convinced the other way. Neither party is being particularly scientific about this or any other political issues. And yes, this is only politics. Climate science deserves a lot more than a binary vote.
There are no significant differences in the senators between the two parties. They both wine and dine together, both came from big old-school money, went to Harvard, etc. Mostly law degrees. What did you think, the democrats were all scientists and the republicans all oil surveyors?
Grow up, take the blindfold off. You have been pulled into drinking the party's punch. Stop before it's too late.