Denouncing is an odd word to use or expect. A a Christian isn't going to "denounce" the Bible, even if it's the Old Testament.

I think the proper way to put it is seeing the Old Testament through the vision of Jesus Christ as the Messiah and fulfillment of the Old Testament, which itself is complicated and confusing. It really confused St. Paul when he realized through his vision the Truth, and it took time for him to reconcile his knowledge of Scripture with the reality of Christ.

Regardless, too many Protestants find that hard, because that admits that Christ fulfilled the Jewish faith, and that is "antisemitic"...see Ted Cruz as an example of that opinion. He thinks fulfillment theology is some sort of error, but it's exactly what the apostles came to believe and practice.

Anyway, I hope more Christians come to listen to the current Pope. I could understand ignoring Pope Francis, as he was relatively inconsistent and incoherent, especially for English speakers, but Pope Leo has not shown the same negatives yet.