Harvard Law School Professor Alan Dershowitz believes American Jews should take up arms against their imminent demise. JULIE EDGAR SENIOR WRITER Alan Dershowitz: "We can't blame it on the goyim." lan Dershowitz is worried — pro- foundly so. The Harvard Law School pro- essor, who is as vilified as he is cel- ebrated for the legal causes he's championed, has taken on the role of town crier: He is convinced that unless we do something now, the American Jewish community will disappear into the oblivion of history books. And being what some would call an egomaniac, he is offering to help us save ourselves. In a recent Jewish News interview, Professor Der- showitz said The Vanishing American Jew, issued last month by Little, Brown and Company, is the most difficult and most important book he's written. It is certainly his most personal. One can imagine him standing on a rooftop entreating passersby to heed his warnings. Although he had already started researching his book, the 1995 assassination of his friend, Israeli Prime Minister Yitzhak Rabin, intensified his desire to start writing it. "It moved me so much. It confirmed my thesis so strongly that our problems are coming from with- in, not without," he said. And while The Vanishing American Jew touches on the heightened tensions between secularized and religious Jews in Israel, its premise is that assimi- lation- that has come through the virtual disappear- ance of institutional anti-Semitism, coupled with intermarriage and low birth rates among non-Or- thodox Jews, is threatening our very existence. By the year 2076, Professor Dershowitz writes, being Jewish will be a matter of historical curiosity. The children and grandchildren of his 33-year-old son Jamin, who- married a Catholic, most likely won't identify asJews, although they might know of a dead relative who did. "... Jews will become more like other ethnic groups," he writes, "with descendants proudly point- ing to their partial Jewish heritage in the way some Americans today identify themselves as part Scot- tish, part Irish, part Navajo, part French, and so on." THE DETRO • Professor Dershowitz's book is meant as a wake-up call: He would like to convince us that we no longer need persecution or a collective memory of oppression and marginalization to maintain our distinctiveness as a group. "We have to show that Judaism, which is remark- ably adapted to tsuris, can be equally adapted to good times, to being welcome. So far, we haven't been able to do that," he says. One of the best prescriptions for maintaining Jewish continuity? A solid Jewish and secular education. `q talk about the competitive advantage any Jew can get by studying Judaism. My students who attended yeshiva are much better law students, and I've been told they're better in medica?school, they're better as literary critics ..." Professor Dershowitz, not surprisingly, had the ben- efit of both. He was reared in an Orthodox home, at- tended yeshiva and later Brooklyn College, and davened every day. At the age of 25 or 26, when he had children, he realized he wasn't a "religious person." "I realized I was a skeptic. I had to define my Judaism differently. If anything, I became more Jewish, more politically Jewish. Most of my legal career was devot-