Of course there are Liberals who embrace religion, wedlock and personal responsability. There are Conservatives who were integrationists back when that was not fashionable. William Jennings Bryan was a staunch Creationist who was a courageous champion of workers' rights. William F. Buckley (everyone's favorite voice from the right) has, long, taken the position that drug usage should be decriminalized. When it comes to anti-establishment fervor, no Bolshevik can hold a candle to a Montana militiaman.
Perhaps it is time for us to realize that songs and singers are not branded because they support one issue. Grownups can, and should, make decisions based on circumstance rather than alliance. Folksongs, by definition, represent the society or culture they serve. A Christian song need only support Christianity. It does not have to give "equal time" to other religeous groups. It is a "right wing" song in that it upholds Christian values and espouses Christianity as the one true belief.