How do they get away with omitting the central statement of their own Savior's philosophy?  

Been reading John Dean's book, and he explains the Christianists thus (in part):  Many evangelicals believe that because they have accepted Jesus Christ as their personal savior, they are Saved and are bound for heaven.  Thus anything they say or do is right and Godly because they are the Elect.  They don't pause to further examine their actions or beliefs any further, and feel no need to.  This, he says, is called "cheap grace" by other Christians who have a different view, and who appear to have read their unredacted Bibles more closely.

This is part of his discussion of the authoritarian personality types.  Not finished yet, but his descriptions are deeply scary, and yet hopeful.  These are very very bad people and we must defeat them.  They are so bad, however, that our chances are good.  We just need to make sure they are thoroughly marginalized in politics for generations to come.