Getting back to the Bible...
Ezekiel 16:49-50 Behold, this was the iniquity of thy sister Sodom, pride, fulness of bread, and abundance of idleness was in her and in her daughters, neither did she strengthen the hand of the poor and needy. And they were haughty, and committed abomination before me: therefore I took them away as I saw good.
This is what Jesus had to say:
Matthew 10:14-15 And whosoever shall not receive you, nor hear your words, when ye depart out of that house or city, shake off the dust of your feet. Verily I say unto you, It shall be more tolerable for the land of Sodom and Gomorrha in the day of judgment, than for that city.
The sin was inhospitality.
The entire Epistle by Jude tells plenty about Sodom dealing with gay sin. Don't forget why God hates GLBT. Here Leviticus 18:22. Romans 1:25-27,32. 2 Peter 2:6-13 where gays are described as natural brute beasts.