The one that calls G-d a liar? That says that the Torah is a collection of myths that formed over time and redacted constantly until it reached its final form? That says that J*sus could suspend the laws of nature but when G-d A-mighty created the universe from nothing He had to follow "natural laws" that didn't even exist? That says the church fathers were experts when commenting on "new testament" miracles but when they assumed Genesis was true they were merely "men of their time?"
How can any sane person not view such an organization with contempt regardless of how old it is or who founded it . . . especially when it falsely proclaims that its teachings are absolutely unchanged from the beginning?
What do you lack ?
I like to think I lack the chutzpah to call G-d a liar. Does that answer your question?
No. If one were raised Fundamentalist Protestant, converted to Catholic, and then renounced Jesus as Messiah to dabble as a Gentile proselyte in Judaism would it be reasonable to infer such a one may not be a sure and certain interpreter of the holy scriptures, and was still in need of true answers to the soul's burning questions ?