An influential group of rabbis have put the kibosh on a concert planned for next Sunday at MSG’s WaMu theater. Billed as The Big Event, the show was to be headlined by popular Hasidic pop singer Lipa Schmeltzer and raise money for an Israeli charity that finances weddings for orphans. But after an edict was issued against the event, Schmeltzer dropped out, saying, “I have to get out of the fire.” Two Brooklyn community leaders,......