I was going to write a long response to this statement, but then I realized that a long response wasn’t necessary. I have only one thing to say.
My Christian convictions convince me that when Jesus died on the cross, that it was in fact the second person of the Holy Trinity, the Word of God himself, dying on the cross. It wasn’t just a man. It was the God-Man.
I assume you believe, like me, that it was indeed that God-Man who died on the cross. So let me ask you a question.
If human beings can kill the God-Man, like they did, then what’s so hard to believe about a human being giving birth to the God-Man?
Jesus is all or nothing. If he’s God, then he was always God, even in the womb of Mary.