Interesting quotes, but they must be taken into historical perspective, including the atitudes of the authors.

At the time when most of those religious texts were written, women were considered evil, unclean beings. Virginity is a higher state of purity, but it is still an impure condition by virtue of one's femaleness. Mary HAS to be elevated above other women to hold with their belief that Jesus is holy.

Secondly, the general attitude throughout most of Europe was that a child came from a man's seed, while a woman was merely the vessel in which it was planted. (Very pagan in origin, really -- "mother earth" and all that.) Mary's position in theology is not as a provider of genetic material, but as a vessel which grew and gave birth to God's seed. Hence, Mary's pureness is only relevant in light of her as a "clean" vessel to hold the son of God, not as being clean enough to be part of the creation process.

So if we take into account that women are inherently evil but Mary is somehow not, the idea that Mary must somehow be of cleaner birth than other women is tempting to a theologian trying to reconcile the two -- creating a mystical lineage is one way to do that, although it really only moves the problem, not solves it -- i.e. God chose to create a pure vessel instead of Mary being that naturally or God choosing to purify Mary of her "natural" state of impurity in preparation for implantation.

In reality, though, Mary was a 13 year old Jewish girl that could be killed for the crime of being raped. I personally think she either fabricated an excuse OR the trauma of the situation was easier to remember as being a holy event; she may have genuinely believed it happened that way.

Faith in Jesus as the son of God is exactly that -- an article of FAITH for which there isn't a shred of proof. It doesn't stop millions from believing it. The same can be said for any alien origins of Jesus -- belief it may be, but proof? None. (Not unless the hypothetical aliens decide to let us in on the secret, and even then they might be lying to establish credibility...)