In Ezekiel 16:48-50 God compares Jerusalem to Sodom, saying “Sodom never did what you and your daughters have done.” He explains that the sin of Sodom was that “She and her daughters were arrogant, overfed and unconcerned; they did not help the poor and needy. They were haughty and did detestable things before me.”
Certainly threatening to rape angels was an integral part of why Sodom and Gomorrah were destroyed. It was impossible to find 50 righteous people in Sodom... it seems that there are many ways that the cities were beyond redemption.
It is also worth noting that God had purposed to destroy Sodom BEFORE the angels were threatened. The angels were only present because God had permitted Lot to be saved. Even absent the perversion and inhospitality of the events surrounding the angels Sodom was still doomed.
Libchurches would love to make the damning Jude verse go away. Then again, they would like most of the Bible and the very doctrine of sin to go away along with it. It's all rainbows and unicorns and skittles with them.