Zev Chafets writes in the New York Times:
…The Edict intended to close that loophole. It proclaimed, “No male or female member of our community has the right to intermarry with non-Jews; this law covers conversion, which we consider to be fictitious and valueless.”
A 1946 clarification added specifics: “The rabbi will not perform Religious Ceremonies” for such unkosher couples. “The Congregation’s premises will be banned to them for use of any religious or social nature. . . . After death of said person, he or she is not to be buried on the Cemetery of our community . . . regardless of financial considerations.”
With these words, Chief Rabbi Jacob Kassin effectively excommunicated any member of his flock who married a partner with gentile blood.
…Seventy years after the promulgation of the Edict, it seems fair to say that, taken on its own terms, it has been an almost uniquely successful tool of social engineering. The enclave grows and thrives beyond the dreams of its founders. It offers a secure economic future and a sweet family life to those who remain within its confines. As for those who could not or would not fit in, well, every fight for survival has its collateral damage.