I do appreciate the fact that you wrote this and I will take a serious look at it tomorrow.
But my point wasn't that Paul's writings were reliable or unambiguous with regard to the the issue of an HJ, but rather they were the best evidence for an HJ, and more data that suggests gMark is unreliable doesn't undermine the argument that Paul's writing provide evidence for the existence of Jesus (although other arguments and evidence might undermine that claim also).
Well, what I was addressing was this: "the most significant underpinning of the argument that an HJ existed is the letters of Paul that are believed to be authentic."
I was just saying that I'm (provisionally) taking them as authentic too, but I'm not sure how much you can take them seriously, given that he even tells you himself that the only detailed thing he ever writes about Jesus came from a hallucination.I can see how back then that kind of evidence was ok -- and even as late as the Renaissance dreams were allowed as evidence in trials: many witches were burned for what some neighbour dreamed, for example -- but nowadays that's not really ok as evidence goes.
And that's kinda the thing: nowadays that kind of evidence is so ludicrious and would get laughed out the door, that we assume nobody back then would start antagonizing the authorities over something he dreamed. But as an illustration of how ok that was seen among the early Christians, Matthew told them that Joseph not only believed the missus is pregnant with God because a dream said so, but then abandons his home and business and everything and goes to Egypt because another dream said the king wants to kill his baby

Of course, I'm not taking Matthew as a historian, but it illustrates the point that his audience would not go, "wait, was Joseph frakking retarded?" That kind of taking dreams as evidence was obviously OK for the early Christians.
So even if Paul's letters are authentic, and even granting that he may have believed that Jesus was a real person on Earth, there isn't all that much necessity that he'd base it on more than hallucinations and dreams. So it doesn't IMHO point to a historical Jesus all that strongly.
As to issue of whether Maximara's post about Nazareth provided weak evidence in favor of the existence of an HJ.
Maximara suggested that the original gMark probably placed Jesus' town of origin as Capernaunm and not Nazareth. That seems to be more plausible than that it was Nazareth and is consistent with the NT claim that there was a synagog in Jesus' home town. (ETA: at least my gMark credibility meter moved slightly upward after I read this, apparently HM's didn't but I think his gMark credibility meter might be pegged to zero and I'm not sure that it has any freedom to move up).
I wouldn't say zero, but in the absence of any corroborating evidence for the actual events, it is, shall we say, very low. I'm open to moving it up, if evidence supports it, but at the moment corroborating evidence is pretty much what we don't have.
Plus, there's the issue that essentially the accuracy of the gospels about some Jesus events, and the existence of a Jesus who actually did that, are equivalent. If the gospels are accurate at all about Jesus doing X, Y and Z, then there was a Jesus who did X, Y and Z. And if Jesus actually did X, Y and Z that are mentioned in the gospels, then they are accurate about that. It's an implication in both directions, hence an equivalence.
And if X <=> Y, then an argument that boils down to "if we assume X, then Y" is inherently circular logic. When the question is Y, I can't really base it on assuming an equivalent claim to Y. So even if I didn't particularly have anything against Mark per se, you know, I still can't use the conclusion as a premise. There needs to be something ELSE that supports X, before I could go "therefore Y" without committing a fallacy.
That he wouldn't be wrong about a setting, well, that's at least one less detail to undermine his credibility, but it still doesn't support anything about the events he describes.
Corroborating evidence about the places is IMHO something entirely orthogonal. As I was saying, fiction routinely uses real places. The New York depicted in Spiderman comics or Grand Theft Auto is real and decently accurate, for something that's not a city guide, but the events didn't actually happen. And in Mark's case, ok, I can see why he'd want to place his earthly Jesus in some real earthly places, but I'd like to see something supporting the actual events.
The fact that the author of gMark may have incorporated the name of a real religious order in his writings suggests at least some details from first century Palestine were making their way into one of the Gospels albeit in a bit of a confused way. That sounds like a weak argument that, probably oral traditions are making their way to the author of gMark which sounds like weak evidence that gMark may have incorporated details in his work that were true about an HJ.
It's actually not all that surprising, since for example Luke too had heard of a sect of Nazarenes that was apparently active outside of Judaea too. E.g., in Acts 24:5, this accusation is raised against Paul:
"We have found this man to be a troublemaker, stirring up riots among the Jews all over the world. He is a ringleader of the Nazarene sect."
(Incidentally it IS the exact same "nazoraios" word that that Matthew tries to justify as a title for Jesus by placing Jesus in Nazareth. And we can be pretty sure that here Paul isn't accused of being a ring-leader of the villagers of Nazareth. So, whatever the case may be in Aramaic or Hebrew, in Greek the sect name was rendered exactly the same.)
It's not really unusual for someone writing historical fiction to incorporate such elements. We know that for example Luke mined Josephus for events to twist into, for example, parables.
Now I suppose that if the Nazarenes were so obscure that Mark would be unlikely to hear about them except in an oral tradition about Jesus, that would make a case for that oral tradition about Jesus. But actually we see Luke use the Nazarenes as something that would not only be known to the governor, but readily apparent as an accusation against Paul. Either Mark or whoever was making up the stories he transcribed, could easily hear about such a sect otherwise.
Please understand that I wasn't claiming that this was proof or even strong evidence. I am convinced that neither is available with regard to almost any issue associated with first century Christianity.
Well, I didn't say you were. I was just commenting a few details there. Exactly how strong a case remains or how strong a case they make, that you can decide for yourself.