That isn't nearly as bad as her saying a few months before selection that "she needs someone to tell her what the vice president does every day".
As to the why bother hating christian things, its almost exclusively that whole missionary thing. If Christains were like Jews and just kept their religion to themselves, went to church and that was that it would be one thing, but this whole bashing gays, not letting women choose whether to have an abortion, trying to get prayer and creationism in schools thing gets really really old really fast.
If you don't want to raise the ire of everyone who isn't fanatical, don't push your beliefs on them. There were probably more jews then Christains at my high school but I never once had any run ins with the Jews about religious belief but many of the Christains just pushed and pushed on everyone at every opportunity.
When they say things like the Palin teen pregnancy is a personal matter then why the hell are they trying to keep other teens from making the SAME personal choice about whether or not to keep it? If religion is so personal, keep it to yourself.
In the same vein when is the last time you heard about an athiest flying planes into buildings, shooting doctors or starting a "crusade" in the Islamic world (the latest crusade being the one started by Bush, yes he called it just that, a friggin CRUSADE the worst possible word a christain could use to discribe invading an islamic country). The reason religion is so dangerous is that it has real world consequences for believers and non believers alike, when fanatical religion led men to crash planes into the WTC on 9/11 the religous man and the athiest man alike died in the name of fanatical religon. Don't pretend the atrocities of christianity are any less horrific then those of Islam, it wasn't the Islamic inquisition, the Islamic crusades, the Islamic holocaust ect.