This is a video of Messianic Rabbi Gennady Livshits explaining who Jesus is (Scroll down to Who is Jesus 1):
houseofdavidministry.org/programming/television-archive/monday-show.html
Starting at 16:00, he tells the story of how he was speaking with a Catholic woman who uplifted Mary very high, and this Catholic woman could not refute him when he used verse John 1 against her.
Instead of using Luke 1 ("Blessed are you among women . . . ") as defense, how can you make a strong biblical defense against his argument?
I followed the link, downloaded the video, and went to 16:00. It was not as you state. I listened to 19:00+ and it was not about Mary.
Marian doctrine of the Catholic Church was developed by theologians. They saw how important Mary was, by looking at who Jesus is.
If you read the account of the annunciation in Luke, you read that Mary was “blessed” among women – well, among men, too, but they don’t count in becoming the mother of Jesus.
Mary says “all generations shall call me blessed” – and do we? Catholics do.
The Church teaches that Mary was sinless, and so was a creature greater than all others, and next only to God. (This is theology.)
Check the two books at Amazon on Mary by Fr. Luigi Gambero. He discusses the development of the doctrines (teachings) about Mary over the centuries. In these two books, the various theologians rake over the same scriptures, again and again, to come up with these statements of praise for Mary. One of them says it is impossible to give Mary too much devotion.
Some make statements putting Mary dangerously close to being on the same level as Jesus.
They say over and over, that all graces come through Mary (not from Mary, by the way).
Mary is the spiritual mother of all Christians. She is constantly interceding for us. But, if we have sincere and loving devotion to her, she seems to be closer to such believers.
Sometimes the seeming excesses of thought about Mary come to my mind, but there is often an explanation for any statement.
I could go on and on – get the books. Jews mock Christian beliefs about Mary, beginning with the virgin birth – dispute over Is 7:14. Mary’s virginity is one of the oldest doctrines about Mary. we have to agree to disagree.