

Yeah, that stems from the original sense of the word. The story goes a bit like this:
In Genesis 19, Sodom is visited by 2 angels and they were pressured by the men of Sodom to have sex with them. This lead to the interpretation of homosexual activities being an original sin, but there are accounts in the bible that it was not meant that way. Mainly Ezekiel 16:49 which reads
Now this was the sin of your sister Sodom: She and her daughters were arrogant, overfed and unconcerned; they did not help the poor and needy.
So, the sexual advances were likely meant to serve as an example of decadence rather than a stipulation that homosexual activities are sins. But it was simply easier to hate on a marginalized group rather than undergoing the onerous task of actually becoming a better human being.
Sounds about like what I would expect in this world :(