Leviticus uses the word 'abomination' quite often. It also calls for putting adulterers to death. When this pastor advocates taking people who divorce and remarry, lining them up against a wall, and shooting them in the back of the head as well then I'll believe that his motivation is Biblical and not something else.
Stop using the obfuscating tactics of the left. Just because someone does NOT make a major crusade out of other sins on par with a particular sin in question doesn’t mean he endorses that other sin. I’m quite sure the pastor detests fornication, divorce and remarriage, and all other sexual sins outside of marriage.