Why did God destroy Sodom and Gomorrah? I did a quick study looking for verses explaining why and this is what I found.
Gen 18:19-21 Since God chose Abraham to keep the way of the Lord by “doing righteousness & justice” he revealed to him the plan to destroy Sodom because the “outcry against Sodom & Gomorrah is great & their sin is very grave…” (ESV) It does not list specific sin.
Isaiah 1 – The Lord lists the multitude of Judah’s sins and compares them to Sodom and Gomorrah because of their empty religious activities. He commands them to “cease to do evil, learn to do good; seek justice, correct oppression; bring justice to the fatherless, plead the widows cause.” (vs 16b-17 ESV)
Jeremiah 23:14 – The prophet Jeremiah compares the sin of the prophets of Jerusalem with the people of Sodom and Gomorrah. They commit adultery, lie, and assist evildoers, so that they continue in their sin.
Ezekiel 16:49-50 – This is the only passage that directly states what the sin of Sodom was. They were prideful, had an excess of food, and prosperous ease yet they hoarded those things on themselves and neglected the poor. They were prideful and did an abomination before God.
Matt 10:15/Luke 10:12 – Seems to imply that the rejection of the Apostles and their message and thus a continuing in sin will be judged more harshly than the sin of Sodom and Gomorrah.
2 Peter 2:6-8 – Peter says that Lot was greatly distressed by the “sensual conduct of the wicked” which seems to be a reference to sexual sin and lewdness.
Jude 7 – In this verse Jude clearly ascribes a sexual nature to some of the sins of Sodom and Gomorrah, but in its context it would seem the sin he is referring to is the desire to have sex with the angels.
So what is my point? Well it is not that homosexuality is ok. There is plenty of evidence in scripture that the practice of homosexuality is sin, just as there is plenty of evidence that adultery and heterosexual sex outside of marriage is sinful. That being said, the argument that the sin of Sodom and Gomorrah was strictly, or even chiefly that of homosexuality, is not defensible with scripture. Thus, the faulty logic that homosexuality is somehow a bigger abomination to God than other sexual sins is likewise flawed.
Based on this brief study, we have to conclude that the sin that led to the destruction of Sodom and Gomorrah was pride and self-centeredness. They had been blessed by God, but like the rich fool in one of Jesus’ parables, they hoarded God’s blessings on themselves and neglected the poor and needy among them. They did not love God or their neighbors. Even the sexual sin that was present was the result of self-centeredness as they sought to gratify the lust of the flesh. Frankly, I find this understanding of the fall of Sodom to be much more bothersome and convicting to me personally, but it is nonetheless what the Bible teaches.