It appears that THE source of all this doubting of the dates is this one Robin Lane Fox, who wrote the book
The Unauthorized Version: Truth and Fiction in the Bible . Maybe I've overlooked other sources that have been brought up in this discussion? I have the impression that all the evidence has been mustered from this one source -- it's all the same reasoning used there. That's pretty flimsy evidence, facts from one book by one debunker, about which many doubts can certainly be raised, as others have pointed out including me(
Message 25 ):
http://www.christian-thinktank.com/quirinius.html
Anyway, I would say that the very best evidence against all this eager assault on the Bible is that not a single Biblical commentator up until this very recent "discovery" ever found a discrepancy between Matthew and Luke concerning the dating of the birth of Christ, and you can be sure they would have if there was reason to think it, because there are excellent historians among them. The discrepancy is purely the invention of this work of debunkery, as usual forcing Bible believers on the defensive for no decent reason whatever. You read a book, learn the terms of the argument, you don't need to know much history yourself, certainly needn't bother to track down anything that might discredit the argument, just go with what the book says, and there you are, all set to disprove the entire history of Christianity.
By the way, to say Luke was right because he was a good historian is not circular logic. That silly idea is repeated a lot here. Luke is a credible witness with a great track record for accuracy. Logically it is a positive version of the ad hominem: The man is known to be trustworthy, therefore it is reasonable to put trust in his report over a more recent report that has no credentials except itself.
All your reasoning is based on this one piece of debunkery and the usual dismissal of the Bible as evidence in its own right. When are you guys going to see that if you have one witness with an excellent reputation (2000 years of trust in this case) you have to credit that witness with a LOT, but you do the unreasonable thing instead and dismiss that witness altogether. Instead you trust any old piece of imaginative reconstruction of the events, using a few selected historical facts viewed from 2000 years in the future, which necessitates ignoring who knows how many other facts that could disprove the claim, and then you treat ordinary Christians as ignorant and evasive because we haven't the means to answer such a frame-up to your satifaction. Cute.
You need to think about what you guys are doing here. Anybody can play the game of discovering discrepancies in just about anything if there's a will to do that. It's easy to put your opponents behind the eight ball this way, require impossible scholarship to defend themselves and accuse them of copping out when the whole thing was a set up in the first place. Just assemble a few facts at a remove of 2000 years when it's a monumental task to track down any kind of information to rebut the claim, then accuse your opponent of all kinds of perfidious behavior. Not fair play to say the least.
The Bible record remains unrefuted by any fair standard.