It had less to do with homosexuality and more to do with the men of said locations beating on Lot's door, demanding he yield the fantastic asses of the ayylmao's to be gangbanged.
So they did the logical thing: dust off and nuke the site from orbit.
Though from a divine standpoint, homosexuality is incongruent with the course of nature. Hundreds of generations fought and died to survive and give rise to people. It is something of an insult to that process to choose not to pass their survival on through yourself.
It is also not possible for two people of the same sex to partner as those who are of opposite sex often do.
Realistically, homosexuality is a fairly decent indicator (70%) of the presence of physical or sexual abuse during childhood. It indicates there is a pathology that led to improper development of sexuality and also trends with self-destructive patterns with a regularity across all societies regardless of their acceptance of such practices.
Generally, women in the absence of suitable male partners will take each other as partners until a suitable male enters the picture. The prevalence of female homosexual patterns evidences more common abuse than is reported as well as a general failing of the male population to be seen as valid male partners.
IE "the feminazis are not actually attracted to soy boys."
But what do I know about anything.