HASIDIC FACTION BESIEGES RIVALS IN WILIAMSBURG

Hundreds of Hasidic Jews hurled rocks, bottles and vehement curses at the synagogue of a rival group of Hasidim in Brooklyn last night and faced off with scores of police officers in a two-hour confrontation in which dozens of worshipers were trapped inside the temple.

The incident was the latest involving followers of the two ultra-Orthodox groups, the Satmars and the Belzers, who are deeply divided on questions of religious principle. In October 1979, in an incident similar to last night's, 100 Satmar students attacked the same synagogue with rocks, bottles and sticks and left several men bloody.

The outburst last night occurred because of the Satmars' anger over the scheduled arrival tomorrow of the Belzers' grand rabbi from Israel, Yischoer Dov Rokeach, who is to preside over a Belzer convention in New York City this week.

Amid pushing, shoving and hurtling objects, 500 to 600 Satmars, clad in black gabardine coats and felt hats, attempted repeatedly to breach police lines outside Congregation Belz at 186 Ross Street, near Lee Avenue in a predominantly Jewish part of the Williamsburg section. Two Windows Broken

But police reinforcements were summoned, and shortly before 10:30 P.M. they succeeded in dispersing the angry crowds. There were no arrests or reported injuries, but at least two of the synagogue's windows were broken during the siege.

The major difference between the Satmars and the Belzers involves sharply conflicting views on Israel. The Satmars, who say they have 45,000 adherents in Brooklyn alone and as many as 150,000 in the world, are strongly anti-Zionist; they maintain a community in Israel but do not cooperate with the secular government or accept money from it.

The Belzers, who number 1,500 to 2,000 in Brooklyn, are strongly Zionist and have a headquarters and more than 10,000 members in Israel, where they enjoy good relations with the government and accept funds for their schools and institutions.

Rabbi Rokeach is scheduled to arrive from Jerusalem tomorrow to preside over numerous meetings at synagogues and hotels in the Borough Park section of Brooklyn and in Manhattan this week. Followers said that, as a result of numerous threats on the rabbi's life, the police had agreed to provide him with protection during his visit. Crowd Screamed Curses

The trouble last night began shortly after 8 o'clock, when scores of Satmars gathered outside the six-story white stone apartment building which houses the Belzer synagogue on its ground floor. Inside, 30 to 40 Belzers were holding a Talmud class.

The Satmars screamed curses and hurled rocks, bottles and eggs. Witnesses said that before the police arrived, some Satmars tried to break in. But before they could do so, members of the congregation locked the synagogue's large front double doors. Neighbors then called the police.

The first officers on the scene arrived minutes after the call, according to members of the Belzer congregation, but neighbors said the disturbance had been under way for 20 minutes by then. By the time the police arrived, the crowd of Satmars had increased to more than 500, witnesses said, and approximately 50 officers in the street were unable to keep the crowd back. Reinforcements were called.

The police have been summoned previously to intervene in disputes involving the two groups, according to Lieut. Edward Hurley of the 90th Precinct.

There was some pushing and shoving, but no blows were struck, the police said, and the group was finally persuaded to disperse. The Belzers then emerged from the synagogue and, passing knots of police officers, left a nearly deserted street littered with shards of broken glass.

''It's like the Hatfields and the McCoys,'' Officer Steve Bonomolo said when it was all over. ''There were 500 or 600 people chanting words, a few eggs were thrown, a few bottles were thrown, but it was mostly nonviolent.''

''We're going to drive them out, that's all I can tell you,'' said one departing Satmar. ''These are terrible people, they terrorize everyone,'' said one Belzer.