From the above linked post comparing fornication with homosexual sex.
“So here is the main point at which I am driving. Christians have no chance whatever of challenging homosexual behavior with integrity unless they start with the sexual sins of heterosexuals. We cannot take a morally credible stand against the sexual sins of the small minority of the population if we condone the sexual sins favored by over 90% percent of the population. If fornication is okay, if casual divorce is no big deal, then it rings utterly hollow to try to take a loud (or even a quiet) stand on homosexual behavior.”