It is abundantly clear that homosexuality was the primary evil. The biblical account of Sodom and Gomorrah is recorded in Genesis chapters 18-19. Genesis chapter 18 records the LORD and two angels coming to speak with Abraham. The LORD reiterated His promise to Abraham that he would have a son through Sarah. The LORD also informed Abraham that “the outcry against Sodom and Gomorrah is so great and their sin so grievous.” Verses 22-33 record Abraham pleading with the LORD to have mercy on Sodom and Gomorrah because Abraham’s nephew, Lot, and his family lived in Sodom.
Genesis chapter 19 records the two angels, disguised as human men, visiting Sodom and Gomorrah. Lot met the angels in the city square and urged them to stay at his house. The angels agreed. The Bible then informs us, “Before they had gone to bed, all the men from every part of the city of Sodom — both young and old — surrounded the house. They called to Lot, ‘Where are the men who came to you tonight? Bring them out to us so that we can have sex with them.'” The angels then proceed to blind all the men of Sodom and Gomorrah and urge Lot and his family to flee from the cities to escape the wrath that God was about to deliver. Lot and his family flee the city, and then “the LORD rained down burning sulfur on Sodom and Gomorrah — from the LORD out of the heavens. Thus he overthrew those cities and the entire plain, including all those living in the cities — and also the vegetation in the land.”
The men of Sodom and Gomorrah, thinking that the visiting angels were men, wanted to have sex with them. Those who attempt to explain away the biblical condemnations of homosexuality claim that the sin of Sodom and Gomorrah was inhospitality. While the men of Sodom and Gomorrah were certainly being inhospitable, that clearly was not all. The men of Sodom and Gomorrah desired to perform homosexual gang rape on the angels. Also, God never declared inhospitality to be an abomination to Him, while Leviticus 18:22
While Sodom and Gomorrah were surely guilty of many other horrendous sins, homosexuality was the reason God poured fiery sulfur on the cities, completely destroying them and all of their inhabitants. To this day, the area where Sodom and Gomorrah were located remains a desolate wasteland. Sodom and Gomorrah serve as a powerful example of how God feels about sin in general, and homosexuality specifically.