You read it?
The Holy Spirit has a funny way of working. I became friends with a wonderful guy who happens to be a Fundamentalist Christian. As we would talk he would mention some of the things that Keating talked about in his book. I was informed that Peter never went to Rome and that the Church was founded by Constantine the Great, and that Easter is really “Ishtar” and other scholarly insights that occupy the minds of Fundamentalist writers. I was told all about Catholicism and how it is really just paganism re-written. To his and most Fundamentalists credit, they literally do not know they are repeating lies. These books are sold at Protestant Book Stores and Churches. Also, he informed me of these things out of love as he believed my soul was in peril. So he could not process the refutations that I would make to him and just go on to the next attack. Most Catholics know about this tactic that Fundamentalists use. They will tell us what we believe and how stupid we are for believing it. 99% of the time they are wrong. The problem is that they have been told by Dave Hunt (his bio is from "rapture ready") or James White that the Calumnies that they are stating are Gospel truth.
After a while I began to pick up more and more apologetics material to refute my friends claims. I also decided that I would no longer play defense with him. I would attack his belief in sola scriptura (scripture alone) and sola fide (faith alone). When I would press him and ask about where those teachings are found in the Bible he would have no answer. This lead to his anger that I was asking too much to show me where the Bible taught either one of those Protestant Traditions (Traditions of men, not of God I might add). I would also repeat what he would say to me but re-phrase it to see if he really was willing to stand by it. For instance, he once told me that he was passionately anti-Catholic. I responded “Really? So if I were Jewish would it be okay for you to tell me that you are passionately anti-Jew?” He was taken aback and responded “Of course not!” I then responded “I guess some hatred is acceptable while others is not”. His response….silence. And then move on to the next attack. That is generally the tactic of the anti-Catholic. Never acknowledge that they are wrong, just move on to the next attack until they find something that the Catholic cannot answer. Usually it ends with some obscure Pope from the 7th century that no one knows about