"[The same-sex marriage battle] was actually lost the moment American heterosexuals succeeded in formally disconnecting sex from marriage. The idea that anyone would be able to limit the sexual revolution to heterosexual adultery and fornication was like saying, “Don’t worry, we’re only going to let one or two evils out of Pandora’s box."" -PCA Pastor Andy Webb
Pastor Webb correctly identifies the 'big bang' of the sexual revolution as "the moment American heterosexuals succeeded in formally disconnecting sex from marriage." The 1960s (and ever since) were rocked by the Pill and all of its siblings: contraception, abortion and sterilization.
How can a pastor slam same-sex marriage yet allow his members to take the Pill for the last 50 years? You must either allow or reject both evils. Only a hypocrite is silent about the evil he does while railing against the evil he does not.