Benjamin Franklin was an intelligent, honest seeker of truth. But he coud see obvious errors in the bible (contradictions, missing scripture, even differing stories on the birth of Christ), which may have caused him to doubt the divinity of Christ. I don't think we should judge him harshly, he was doing the best he could with what he had. Religion HAS come a long way since his time, honest seekers of the truth can be led to it.