I think that because I have never heard Palin say an intelligent thing that wasn't designed to provoke. It is all nonsense and insults. "Spew" is a metaphor, but an understandable one.

You displayed considerable ignorance about her place in American society in stating that liberals fear her. She costs the GOP moderate votes and supported a couple of Senate candidates in primaries who won, only to Spew their way to losing the general election.

Saying that President Obama was born in Kenya is spewing. Saying she can see Russia from her house is spewing. Sarah spews.

If you are looking for someone to champion in US conservatism, you could not do worse than Palin.

If you are looking for someone to represent blind liberalism you could not do worse than Bill D.