I think it goes back to the fact that the evangelical community often does not have a biblical vision of God.
There are reasons why Religious Right Evangelicals will continue to dominate religious discourse, not only in their own sector of the Christian community, but also in what transpires in mainline denominations.
When you talk about evangelicals, don't forget that a significant proportion of the evangelical community is African American. And most African Americans - well over 90 percent, thoroughly evangelical, thoroughly biblical - will probably vote Democratic.