It's great entertainment.
Bart Ehrman has waded in on the mythicism debate, and trying to keep up with the responses is likely to give you whiplash.
I'm halfway through the book in question, Did Jesus Exist? While I'm a fan of Ehrman, I wouldn't count this as his best work. It's a cursory treatment, with a whiff of sniffing disdain. Maybe it improves in the second half. I hope so. Regardless, it doesn't seem an adequate response to Earl Doherty, Bob Price or even George Wells.
So did Jesus exist? Uh, which Jesus? The Jesus of the Jesus Seminar? The Jesus of bleeding heart Catholic iconography? The Jesus of Joel Osteen? The plaster Jesus that hung above the altar at St. Matthew Lutheran Church in my childhood?
No, no, no, no.
The Jesus of the gospel stories, understood - as most folk do - literally?
Get outa here!
The real Jesus, the bloke obscured behind the layered myth? Is he, if he lies hidden at the heart of these many legends, recoverable. If he is, then I side with Ehrman. He must have been an apocalyptic prophet who only faintly resembled the many projections that Christians have invented in his stead. If he isn't recoverable, the whole question becomes moot. The stranger of Galilee remains an utter stranger, and his putative existence doesn't make much difference.
Meantime the battle (should that be bartle?) lines have formed, and the generals are huffing and puffing, talking past each other, clarifying, explaining, re-explaining, reclarifying, taking pot shots.
If you're into this sort of thing it's probably the best show in town.