Tankard Reist is a Baptist. Their belief system includes the second coming of Christ, end times, evangelism, and the belief most relevant to this post and a central tenet of the Baptist faith: the Virgin Birth.Again, why not debate this rather than threatening to sue? If Tankard Reist is not a Baptist, then she can simply say so, perhaps with some plausible corroborating detail about where she does stand theologically. It doesn't have to be a lot of detail, just enough to deal with the general issue.
Tankard Reist believes that the woman chosen to bring the boy god Jesus into the world was a virgin. Mary did not conceive the baby Jesus through sexual intercourse. The boy god required a fresh, unsullied virgin to inhabit throughout his gestation.
Why? Because the followers of the doctrine of the virgin birth believe that sex filthies the human female, and renders her impure. The inherent impurity of female sexuality can be tempered by the sacrament of Christian marriage, wherein sex is a means of reproduction, and offers relief for the male. It is better to marry than to burn, advised St Paul, demonstrating how little he thought of female sexuality.
The boy god needed a pure vessel, unfilthied by sexual experience. In this sense Mary was the most famous objectified woman in the history of the world, for to dehumanize a woman to the extent that you perceive her sexuality as filthy is objectifying indeed.
The Virgin Mary was in fact co-opted as a dehumanized life support system for a foetus.
It is from this fundamental position that Melinda Tankard Reist advises women and girls on sexual matters.
In my opinion, the issue of whether or not she is, specifically, a Baptist is something of a red herring. In my experience of Baptists (which is considerable), they vary quite a bit in their theological positions, and they don't actually put a huge emphasis on the doctrine of the Virgin Birth (though they do formally subscribe to it). It's more a Catholic thing to put a huge emphasis on the Virgin Birth, the importance of Mary as an iconic figure, and the great moral significance of chastity and purity.
That said, conservative Christianity in general does tend to be permeated by ancient ideas of the shamefulness of sex and the body. Those ideas can be found in the writings of St. Paul, Augustine (in particular), and (to a lesser extent) Aquinas, and they go very deep in Christian approaches to sexuality and gender roles. That's the point that Wilson really needed to make, and it is really, in essence, what she is relying on.
Tankard Reist's best reply is to explain at least something about her theological position, to assert clearly that her social and political views are not, in fact, influenced by theological ideas of the shamefulness of sex and the body, and to try to show how those views can be justified in entirely secular terms.
Of course, we might be sceptical about this, even if she said it - after all, her overall set of concerns and policy views is very typical of a theologically conservative Christian, and ideas of sex and the body being shameful can be picked up unconsciously. They are deeply embedded in our moral traditions and are continually reproduced in numerous ways.
But there are ways that Tankard Reist could debate all this without having to spell out the entirety of her theological position (I agree that this would be burdensome and unnecessary).
As I said in a comment just now, on another post, the one thing she should not be doing is threatening to sue opponents for defamation. At least, not over something like this.