What I learned from this book is that some Orthodox Jews follow a welter of trivial rules that, growing up in an Orthodox home, I never heard the likes of. Cohen dwells on "rules" like you should tie your left shoelace before you tie your right one (why I have no clue), and both complains about their absurdity and the lack of spirituality in his Orthodox upbringing. To be fair, I must say I do know Orthodox Jews who do find spirituality in their practises, but I don't know if they tie their left shoe before the right one.
In any event, Cohen decides to go on a quest for a year to seek out Christian churches, not to change his religion, as one might think, but to find out why Christians go to church and seem to enjoy it. His Jesus year is spent going to megachurches, Fundamentalist churches, Catholic churches, even a monastery. Guess what? In the end, he decides to stick to Orthodox Judaism because he has figured out how to connect with God spiritually as a Jew.
His writing is sprightly and engaging. He gives an outsider's view to listening to people speak in tongues and praising God jubilantly. He even wonders why Jews don't have megachurches. Since he's already said Jews comprise only 2% of the US's population, I think that would have occurred to him as the answer, but it doesn't.
Instead, he says that when he asked other Jews this, they said that Jews couldn't afford it. Cohen, the son of an Orthodox rabbi, a profession not known for yielding wealth, pooh poohs this, saying that studies have shown that Jews have better incomes than any other ethnic group. Hold on. That isn't what studies show, although popular myth is that all Jews are rich. What studies really show is that a larger perecentage of Jews are in the middle and upper middle class income brackets, and fewer are in the lower middle class and welfare brackets. As for mega-rich Jews, there are far fewer of them than of Christian megarich. However, since there are so few Jews, this doesn't mean that Jews as a whole can command the millions that megachurch preachers can.
He might also have considered that the megachurches take credit cards in the offering baskets and some even have ATM's in the churches, not to mention all kinds of goods and services to by. Preachers also are on TV asking viewers to send in donations and telling them if they do, they will get rich. Well, Judaism doesn't promise wealth to believers or any worldly benefits. Nor do they punctuate religious services with displaying 800 numbers for people to call in their donations.
There is no way that Judaism can do those things. You cannot handle money on the Sabbath or on holy days! There are no baskets sent around during religious services. Synagogues and temples get their incomes from families paying annual dues, usually around $1000 -$5000 a year, according to their incomes. And, if people can't afford dues, then they just go to services for nothing.
The scads of money that Cohen saw preachers rake in during their services can't be emulated in a Jewish service. Since the preachers have their congregations in an aroused state when they start passing the money trays, their congregants are stimulated to give even more. In at last one instance he observed, the choir itself urged people to give. Jews just get a bill in the mail. It is not too stimulating to just open a bill for your annual dues and all too easy to be pissed if they've gone up.
It is most strange to me that Cohen misses the biggest reason that Jews have fallen away from their religion. When the immigrants from Eastern Europe came here in the early 20th century, they came from places where, as Jews, they were humiliated and scorned overtly. Here, they just had to don ordinary American clothing and presto! they were treated like everyone else. Since the Jewish Sabbath doesn't coincide with the Christian retailing or work calendars nor with the many Jewish holidays like Purim, Shavuot, T'isha Ba'av, Passover, The Fast of Esther, The Fast of the First Born, etc. assimilating meant giving up all but the holiest holidays. Saturday was a regular work day in the early 20th century, and many of the Eastern European Jews who immigrated then were skilled workers in factories. Those who were in retail had to keep their stores open on the Sabbath.
Without the reinforcement of being able to go to worship services on a weekly basis, of course commitment to Judaism lessened. Add to that what Cohen himself admits at the start of his book, Jews wanted to be able to do what Christians do, like eat pizza or have a cheeseburger. There went the Kosher laws, which also were a powerful binder to Judaism. It's not that there's anything more wrong with Judaism than there is with Christianity. It's just that we are a Christian nation. Christian holidays are national holidays. Jewish ones are not. Christians are the norm whom Jews emulated and became assimilated to. When I was in elementary school, we made Easter murals and read stories about the Easter bunny, but there was no mention of Passover. In music class, we learned Christmas carols, not Adon Olom.
In short, being Jewish may be cool for comics, but abiding by Jewish practises is not cool at all. In the 1950's, coming from an immigrant Orthodox family, I had to give it all up, become as un-Jewish as I could, in order to be accepted by the Jewish kids in my high school. And that was not unusual exept, perhaps in New York City which housed such a large number of Jews. In other places in America, there were either no Jews at all, or very few. Mr. Cohen, there's your answer, not megachurches supported by supposedly wealthy Jews.