An orthodox, or even just a plain "religious" Jew, would not be a "mild" critic of divorce. Family, responsibility, constraints on behavior, absolute values are all part of the religious person's life. He's now off the plantation twice in 17 years, and something seems fishy to me.
He apparently is merely a cafeteria Torah follower, picking and choosing among the offerings, and so how can he deride other lifestyle "choices " like polygamy, homosexuality, and so on, without sounding like a hypocrite? And without theologistic support, what has he to offer? He's not a tax adviser, he's a proffessional moralist. And he's full of crap, as far as I can tell.
Dennis has explictly said many times that he is a traditional, but not orthodox, Jew. Does Jewish law flatly forbid divorce in all circumstances?
No, I don't think so.