Abrahamic conservatives can never justify their opposition to small groups of people practicing homosexuality, nor can they justify their beliefs which is their key weakness.
The argument goes something like this.
>The government has an interest in the production of the next generation.
>The more homosexuality is accepted by society, the more closet homosexuals will come out and not produce children. (As opposed to the 1950s when nearly all homosexuals got married and had children because of societal pressure.)
>Therefore, governments have an obligation to ban "Gay Propaganda" or "being openly gay".
Imo, banning "Gay Propaganda" or "being openly gay" is a last resort measure due to the obvious civil rights issue. Only if humanity faces extinction should such drastic measures be attempted.
NOTE: The bible only forbids "lying with mankind as with womankind". Common misconception.