That's what puts the FUN in Fundamentalism.
People get to say that any passage which may be interpreted as allowing them to do what they want, is God's eternal and unchanging word, and MUST be taken literally.
And any passage which instructs them to refrain from doing what the want to do, or to do what they would rather NOT do, must be taken as an allegory.
Quick example: Dudes skroon dudes, supposed to be stoned to death. According to the Fundies, this justifies banning same-sex civil unions.
But, people working ANY job on the Sabbath, same penalty. Death by stoning. Same doggone Fundies let millions of people get away with that, without batting an eyelash.