People don't need a degree or perform a "background" study in Scripture to either embrace or reject what it entails. It's contents and background have never been secret, as the JWs often teach it is.
A person who makes an honest conscientious decision to reject the Scriptures are not viewed as morally flawed or evil by Jews or Catholics unlike Jehovah's Witnesses do. Freedom of conscience is even fought for and advocated by these religious groups, including not merely the right to reject religion but the right to being treated justly, with more than mere tolerance, and ensuring the dignity and fair treatment of all regardless of creed or rejection thereof. If a Catholic or Jew does not judge a person by their view of the Bible, of what significance can such judgment be from lesser, insignificant religious groups and their adherents?
The problem with some of these questions is that they mistake rejection of the Bible with disrespect or failure to act with wisdom and insight. The important matter at hand is not the varied views among ex-JWs, whether some accept or reject Scripture now, but that despite these current views all are united in the stand that the Jehovah's Witnesses are not the teachers of religious truth that they claim to be. The Watchtower view of Scripture is so flawed that even when the Bible is merely viewed from a secular non-inspired point of view, the Jehovah's Witness interpretation of this Book can honestly be labeled as an axiom of disrespect and a poor excuse for scholarship.