I found him to be credible too, not only because he was adamant about his innocence and anxious to tell his side, but the explanations were logical and clearly verifiable, so he’d be a moron to say things that will be easily disproven.
For example, he said his only visit to Pedo Island was shortly after Epstein bought it and before it was developed as it is today, and that his wife and daughter were with him. No young girls, just a housekeeper. Same with staying at Epsteins NY home, which was when he attended a grand daughters sports tournament. Again, verifiable, which is why he says he has the proof that she’s lying about him. That’s not to say she’s not telling the truth about others but that remains to be seen.
Since he is, as you say, a very skilled orator and intimately familiar with the law, for me it put him back in the neutral category, rather than being convinced of his guilt as I’d become from her statements. When someone is as adamant as he is about investigating everything and finding the truth, either they have truth on their side or they are supremely confident in their lies. Since he’s not in control of all the evidence that potentially exists (such as video and photos), it seems most likely to me that he’s being truthful.
A few points to consider (among many more) -
The deal he negotiated for Epstein including a NDA
The 'perfectly innocent' massage he admitted receiving at Epstein's Palm Beach mansion
His trashing of victims Epstein was already charged with abusing
His claim that Clinton is innocent despite the flight logs and witness accounts.
Just saying...
About the massage, Dershowitz claims, "I kept my underwear on."
What a guy!
(There is that fly thingy though, right Alan?)
https://crooksandliars.com/2019/07/alan-dershowitz-i-kept-my-underwear-during