He does because he is a cultural elitist.
I have had this conversation with a conservative (politically) Jewish friend of why many Jews will not potentially vote for Sarah, not that they are cultural elitist, but they can't relate the likes of Sarah culturally.
They ( the cultural elitist ) beltway types Can't or never have or never will do some of the Palin's life style choices below:
1.) Ride a snowmobile
2.) Hunt and Shoot and actually eat the meat you shot
3.) Fly a Seaplane ( the last politican that did was "Bee-bee" Rebozo, he had a Sea Bee, that was eon's ago )...
4.) Drive a Pickup (yes the Palins have a Dodge Ram)
5.) Actuall run a small business
It is a "Go West young Man or Women" mentality that they don't have and don't get vs. their education geared them towards being the "Great Oz" of the "process".
Process we don't need no stinking process, and they can't stand to hear it...
Charles is so often cool and correct but he really gets worked up (and wrong) about Sarah and us hard core conservatives. Just as you said, there must be more to it than simple politics.
I'm not Jewish, and those things you listed are among the reasons I love Sarah. I guess that's a little confirmation of your theory.