WASHINGTON — The Supreme Court ruled Friday that Maryland parents who have religious objections can pull their children from public school lessons using LGBTQ+ storybooks.

With the six conservative justices in the majority, the court reversed lower-court rulings in favor of the Montgomery County school system in suburban Washington. The high court ruled that the schools likely could not require elementary school children to sit through lessons involving the books if parents expressed religious objections to the material.

The lack of an “opt-out,” Justice Samuel Alito wrote for the court, “places an unconstitutional burden on the parents’ rights to the free exercise of their religion.”

Justice Sonia Sotomayor wrote in dissent for the three liberal justices that exposure to different views in a multicultural society is a critical feature of public schools. “Yet it will become a mere memory if children must be insulated from exposure to ideas and concepts that may conflict with their parents’ religious beliefs,” Sotomayor wrote. “Today’s ruling ushers in that new reality.”

The decision was not a final ruling in the case, but the justices strongly suggested that the parents will win in the end. The court ruled that policies like the one at issue in the case are subjected to the strictest level of review.

The school district introduced the storybooks, including “Prince & Knight” and “Uncle Bobby’s Wedding,” in 2022 as part of an effort to better reflect the district’s diversity. In “Uncle Bobby’s Wedding,” a niece worries that her uncle won’t have as much time for her after he gets married to another man.

The justices have repeatedly endorsed claims of religious discrimination in recent years, and the case is among several religious-rights cases at the court this term. The decision also comes amid increases in recent years in books being banned from public school and public libraries.

Many of the removals were organized by Moms for Liberty and other conservative organizations that advocate for more parental input over what books are available to students. Soon after President Donald Trump, a Republican, took office in January, the Education Department called the book bans a “hoax” and dismissed 11 complaints that had been filed under Trump’s predecessor, President Joe Biden.

The writers’ group PEN America said in a court filing in the Maryland case that the objecting parents wanted “a constitutionally suspect book ban by another name.” PEN America reported more than 10,000 books were banned in the last school year.

“By allowing parents to pull their children out of classrooms when they object to particular content, the justices are laying the foundation for a new frontier in the assault on books of all kinds in schools,” said Elly Brinkley, a lawyer for the group’s U.S. Free Expression Programs.

“In practice, opt outs for religious objections will chill what is taught in schools and usher in a more narrow orthodoxy as fear of offending any ideology or sensibility takes hold.”

Lawyer Eric Baxter, who represented the Maryland parents at the Supreme Court, said the decision was a “historic victory.”

“Kids shouldn’t be forced into conversations about drag queens, pride parades, or gender transitions without their parents’ permission,” Baxter said.