That assessment isn’t far off actually. The subliminal message is that Palin feels the need to ask protection from witchcraft.
A deeper subliminal message might be to suggest that she herself practiced it and is receiving absolution through the blessing.
Who knows what goes through their goofy minds?
crowd: Oooh
Bedevere: Exactly!!....Who are you who are so wise in the ways of science???
The truth is that most Americans believe in the supernatural. This could help Sarah more than hurt her.