The lost have no bias about God, do they?
Did you choose God or did God choose you? What ethnicity on earth did God choose, even if they rejected God? Do you think a Jewish rabi today is any less knowledgeable about the OT, than a Catholic priest? Now compare the extra biblical writings of the Jews and those massive volumes of theology of the RCC. You do realize that the OT was God's Word to the 1st century writers and Jesus? The NT does describe the church, but the OT describes God dealing with humanity way more than the NT does. That a Jew rejects the most important moment in History, does not necessarily mean they cannot know God. It only may mean, God will never know them, because they will reject God and one day explain to God why they did, and God will tell them on that day, depart from Me.
Do you think church theology is that much better than Jewish theology? Did the church pass on the fact that Babylon was a thriving city in the 1st century? How much of history did the church rewrite to prove untrue facts? The Jews outwardly rejected Christ. The church ran with Satan's deception hook, line, and sinker. The church rewrote history and martyred those who knew the truth. I am not defending Jewish theology, just pointing out, human theology is full of holes and error, and trusting one over the other is foolish.