27 "You have heard that it was said, `You shall not commit adultery.' 28 But I say to you that every one who looks at a woman lustfully has already committed adultery with her in his heart. 29 If your right eye causes you to sin, pluck it out and throw it away; it is better that you lose one of your members than that your whole body be thrown into hell. 30 And if your right hand causes you to sin, cut it off and throw it away; it is better that you lose one of your members than that your whole body go into hell. 31 "It was also said, `Whoever divorces his wife, let him give her a certificate of divorce.' 32 But I say to you that every one who divorces his wife, except on the ground of unchastity, makes her an adulteress; and whoever marries a divorced woman commits adultery.Or Matthew 15:18
18But the things that come out of the mouth come from the heart, and these make a man 'unclean.' 19For out of the heart come evil thoughts, murder, adultery, sexual immorality, theft, false testimony, slander. 20These are what make a man 'unclean'; but eating with unwashed hands does not make him 'unclean.' " The "evangelical left" is undoubtably thinking about the story of the adulturess. But the point of that story is that we are supposed to forgive sinners, not that adultury is not a sin.
Doh! My mistake, I did not notice the word “rebellion” in the article. It looks like the red letter Christians are upholding Christian morality.