If he had kids, would they also be perfect? If so, they could also could also die for our sins. O yeah, he is perfect cause he never sinned. If he came from a virgin, he never got Adam's seed and was perfect from the beginning. Lets say that you were born of a virgin. You would have to spend your whole life without lying, stealing, committing adultery, murdering (which says the Bible is the same as hating someone), and having no other gods. If you can do all that then let me know.
the idea of chastity as it relates to holiness is utterly foriegn to judaism.
Last time I checked he shot down Judaism when he claimed to be the Messiah.