How do they get their own story wrong? His mom wasn't the virgin, he had at least one sibling. It's her that was born of a virgin, in other words jebus' granny was supernaturally told to gfy and did it so well she's made a clone called Mary.
Her pregnancy came through the Holy Spirit. She was not married at the time and Joseph wanted to leave her when he heard she's pregnant (but an angel explained to him in a dream what is going on). That's the story according to the Bible, so not sure what you're talking about.
That’s not what Catholics or orthodoxes believe and considering it’s hard to find a take on Christianity that isn’t held by any Protestant group I’m not likely to believe any of them as the word on Christianity.
Catholic doctrine is that Mary was a virgin who today we would consider a child/adolescent who was married but not consummated with a laborer descendant of David. She was asked by an Angel to bear Jesus and accepted without hesitation. And she remained a virgin until she ascended to heaven body and soul at the end of her life.
The eventual creation of the dogma was due more to popular devotion than scholarship.[34] The Immaculate Conception became a popular subject in literature and art,[6] and some devotees went so far as to hold that Anne had conceived Mary by kissing her husband Joachim, and that Anne's father and grandmother had likewise been conceived without sexual intercourse, although Bridget of Sweden (c. 1303–1373) told how Mary herself had revealed to her that Anne and Joachim conceived their daughter through a sexual union which was sinless because it was pure and free of sexual lust.[35]"