There's evidence that stupidity is a genetic trait. Should we make it illegal for stupid people to have sex?The extent to which you just dont get it is remarkable.
Please, educate me.
If you can.
Disallowing siblings to marry is applied to everyone equally: all races, creeds, colors, and sexual orientations; no suspect or particular class of persons is singled out to be disadvantaged. Consequently the burden on the state to defend such a prohibition is very slight, where such a measure would withstand rational basis judicial review.
That sounds just like the argument the state used in Bowers v Hardwick, and all the other cases that the court has ruled on in the past, that held that homosexuality and gay marraige were legitimate state interests and could be banned. Strangely enough, they have all been overturned, yet you think they still apply to things you don't like.
There is documented evidence of birth defects and other serious conditions resulting from a brother and sister procreating, however extremely unlikely. Under rational basis judicial review that evidence is sufficient to justify such a prohibition, where the restriction seeks a legitimate legislative end.
There is also documented evidence that birth defects result when a parent smokes, or when the mother is over 40, should we make it illegal to get married if you smoke or are too old?