TTWSYF: "There is a history of interpretation that goes back 2000 years and IS consistent in it's teachings. Why would anyone want a NEW interpretation that has only been around a few hundred years or less? How could such new interpretations be more legitimate than the oldest?"
Good questions!
Paul advised the Thessalonians to "Make sure of all things." The problem is that no one can be 100% certain on so many things biblically related. From another angle, on NEW interpretations, someone could say that those who come up with such have the advantage to cull out long-seated errors of traditionalistic dogmas. Again, there is no guarantee that these will offer any better substance than the former. Hence, a lot of things come down to faith.
In some ways, our problems are not so different from the culture of the First-Century C.E. We have so many conflicting issues to deal with, religious and not, just like they did. They had an established system of teachers of great reputation. Their religions could not agree on their differences. Politically speaking they were divided as we are today, and religion was no less a strong factor to deal with.
In the middle of it all, Jesus Christ's preaching was interesting to say the least. His message of relief was sweet to those suffering at the hands of the powerful ones. At the same time, you had the academic and political forces spewing other signals. "Who can you trust" surely was in the minds of the masses. Well, they too had to rely on faith and logic. In the minds of detractors, even the display of miracles of Jesus and his followers were no guarantee that they originated from God. Critics blamed Lucifer or some other for their apparent powers.
In all, among the prevalent uncertainty of the political and religious establishment of the times, the Christian followers had to listen to their own inner wisdom, and had to decide whether to follow the cruel arrogant ways of the world, or go instead after the model of Christ with its plain message of love, mercy and simple daily living. We can all certainly learn from this.