The Hebrew Bible in (Genesis 13:13) says simply that the men of Sodom were wicked and sinners against the Lord, exceedingly. Targum Pseudo-Jonathan refuses that generality. The Aramaic opens the indictment into four specific counts.
First: they were depraved in their wealth one with another. The Targumist begins with economics. Sodom's wickedness starts in how the rich treat the rich — corrupt dealings, twisted contracts, neighbor defrauding neighbor. The sin is not poverty; the sin is what the prosperous do with their prosperity.
Second: they sinned in their bodies; they sinned with open nakedness. The Targum names sexual misconduct. The Aramaic does not linger in detail but the indictment is plain.
Third: the shedding of innocent blood. This is the Targum's way of saying Sodom was violent. Not only immoral in private but murderous in public.
Fourth: they practiced strange worship, and rebelled greatly against the name of the Lord. Idolatry, the cap on the list.
The Targumist's catalog is a miniature theology of civilizational collapse. A society can fall through any one of these, and Sodom has chosen all four: economic corruption, sexual violence, murder, idolatry. The destruction that will arrive in (Genesis 19) is not random fire from a capricious sky. It is the delayed verdict on a society that has been convicted, by its own conduct, on every count.
The Sages will later say in Pirkei Avot 5:10 that what is mine is mine and what is yours is yours is the character of Sodom. The Targumist has already made the case in verse. Sodom's worst sin was the quiet, daily refusal to share a well with the stranger. The fire only made visible what the accounting had long since proved.