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The Christianists that now dominate the Republican Party don't seem to be interested in the teachings of the titular founder of their religion. It's much more about Leviticus, the misogyny and revulsion with sex of Paul, and the apocalyptic vision of John. Jesus? Not so much -- too "liberal."
For Christianists, religion serves their right-wing political ideology -- not the other way around. Just look at the way they threw Jimmy Carter, a true practicing Christian, overboard for the shallow Hollywood Christianity of Ronald Reagan, and their adoration of the phony "Santa Claus" Christianity of George W. Bush.