The spread of Hasidism also incurred organized opposition. Rabbi Elijah of Vilnius, one of the greatest authorities of the generation and a "hasid" and secret kabbalist of the old style, was deeply suspicious of their emphasis on mysticism, rather than mundane Torah study, threat to established communal authority, resemblance to the Sabbatean movement, and other details he considered infractions. In April 1772, he and the Vilnius community wardens launched a systematic campaign against the sect, placing an anathema upon them, banishing their leaders, and sending letters denouncing the movement. Further excommunication followed in Brody and other cities. In 1781, during a second round of hostilities, the books of Jacob Joseph were burned in Vilnius. Another cause for strife emerged when the Hasidim adopted the Lurianic prayer rite, which they revised somewhat to Nusach Sefard; the first edition in Eastern Europe was printed in 1781 and received approbation from the anti-Hasidic scholars of Brody, but the sect quickly embraced the Kabbalah-infused tome and popularized it, making it their symbol. Their rivals, named "Misnagdim", "opponents" (a generic term which acquired an independent meaning as Hasidism grew stronger), soon accused them of abandoning the traditional Nusach Ashkenaz.