A federal judge on Tuesday temporarily barred the University of California, Los Angeles, from allowing protesters to block Jewish students from having access to the campus and facilities such as libraries, classrooms and gathering places.

Judge Mark C. Scarsi’s preliminary injunction order came after three Jewish students sued the university over protests in the spring concerning Israel’s military campaign in Gaza. The demonstrations roiled the campus, and more than 200 people were arrested after pro-Palestinian protests and pro-Israel counterprotests turned violent.

During those demonstrations, pro-Palestinian protesters set up an encampment with plywood and metal barricades in Royce Quad, a major thoroughfare. The judge said they had “established checkpoints and required passers-by to wear a specific wristband to cross them,” blocking “people who supported the existence of the state of Israel” from entering the encampment and other areas of the campus.

Judge Scarsi said that constitutional protections for religious freedom prohibited the university from allowing such encampments to stand if they prevented the campus from being “fully and equally accessible to Jewish students.”

“Jewish students were excluded from portions of the U.C.L.A. campus because they refused to denounce their faith,” Judge Scarsi wrote in the order. “This fact is so unimaginable and so abhorrent to our constitutional guarantee of religious freedom that it bears repeating.”

Judge Scarsi said that U.C.L.A. had argued that it “has no responsibility to protect the religious freedom of its Jewish students because the exclusion was engineered by third-party protesters.” But he said it did not matter who blocked the students.