If you've read (or should read) The Scandal of the Evangelical Conscience by Ron Sider, consider this too:

Conservative Christianity's new mandate is to forcibly prohibit any American from indulging in what they consider the worst sins-sins that used to be things like arrogance, selfishness, violence, greed, indifference to human suffering or even torture, but are now things like sex-ed, Halloween, cursing on TV, gay marriage, Harry Potter, "Happy Holidays" and Spongebob Squarepants.
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Confrontational evangelism is the evangelism of choice in conservative churches today because it offers an outlet through which members can use their energy, passion and talents not to minister to individual souls (who may or may not be receptive or grateful), but to work with others in order to make a tangible difference in the way all Americans behave. The assumption-and it's a big one-is this: If you change the behavior, the souls will follow.

[via Jesus Politics, emphasis mine]