Well, at the end of the day a few things seem clear...
Scholars and christians themselves do not agree in interpretation (or method of interpretation) of the Bible. Things were the same way in Jesus' day among the religious authorities and the people.
It is in that context of not agreeing on interpretation and method that Jesus was asked to cite the greatest commandment. It was good news to the people who were being made to feel guilty and doomed for this, that, and the other, as it was coming against them from many differing schools of thought.
We don't need to agree on these things in order to love God with everything that we are, and our neighbor as ourselves. As Hosea Ballou said, "If we agree in love, there is no disagreement that can do us any injury, but if we do not, no other agreement can do us any good. Let us endeavor to keep the unity of the Spirit in the bonds of peace."