A woman walks past the US Department of Justice Building, in Washington, DC, Dec. 15, 2020. Photo: REUTERS/Al Drago

The US Department of Justice has secured the conviction of a Massachusetts man who threatened to perpetrate mass killings of Jews, according to a new announcement by the agency.

Over several months, John Reardon, 59, called Jewish institutions across Massachusetts, proclaiming that he would kill Jewish men, women, and children in their houses of worship. His terroristic menacing included promises to plant bombs in synagogues in the cities of Sharon and Attleboro, as well as making 98 calls to the Israeli Consulate in Boston, a behavior which began on Oct. 7, 2023 and ended just days before his apprehension by law enforcement in January.

Reardon has declined to contest the federal government’s case against him and pled guilty on Monday to stalking, threatening “force” to obstruct religious freedom, and transmitting threats “in interstate commerce.” He faces up to 30 years in prison and $750,000 in fines.

“This defendant’s threats to bomb synagogues and kill Jewish children stoked fear in the hearts of congregants at a time when Jews are already facing a disturbing increase in threats,” US Attorney General Merrick Garland said in a statement. “No person and no community in this country should have to live in fear of hate-fueled violence. The Justice Department is committed to using the full force of our investigative and prosecutorial authorities to root out these threats and ensure that all people are protected in the expression of their faith.”

FBI Boston Field Special Agent in Charge Jodi Cohen added, “When John Reardon threatened to kill members of the Jewish community and bomb places of worship, the FBI and our partners immediately mobilized. After all, you cannon call and threaten people with violent physical harm and not face repercussions. People of all races and faiths deserve to feel safe in their communities. With today’s guilty plea, John Reardon is now a convicted felon.”

Reardon’s conviction came amid a record surge in anti-Jewish hate crimes across the US following the Palestinian terrorist group Hamas’s massacre across southern Israel last Oct. 7, amid the ensuing war in Gaza.

Earlier this month, for example, law enforcement officials convicted a white supremacist who repeatedly vandalized a synagogue in Eugene, Oregon during spree of hate in 2023.

Motivated by antisemitism, Adam Edward Braun, 34, graffitied the Temple Beth Israel synagogue twice in September 2023, spraying “1377” for its resemblance to “1488,” a reference to Adolf Hitler and a white nationalist slogan. He came back several months later to vandalize the glazing of the synagogue’s entrance. However, he abandoned that activity after spotting a surveillance camera and opted to graffiti “white power” elsewhere on the grounds.

In addition to prison, Braun faces a maximum $100,000 fine, the total amount of which will be determined when he is sentenced in February by US District Court Judge Michael J. McShane. He has agreed to “pay restitution in full to the victim.”

In late September, federal prosecutors helped convict a gunman who shot two Jewish men as they exited a synagogue in Los Angeles.

Jaime Tran, 30 — an affiliate of the “Goyim Defense League” hate group — had gone on an antisemitic shooting spree in February 2023, attempting to murder two Jewish men in the Pico-Robertson section of Los Angeles. Prior to the crimes, Tran called Jews “primitive” and told a former classmate, “Someone is going to kill you, Jew” and “I want you dead, Jew.” According to the Justice Department, he even described himself as a “ticking time bomb,” broadcasting his murderous ideation to all who knew him.

Tran pled guilty in June to four charges the Justice Department described as “hate crimes with intent to kill” and “using, carrying, and discharging a firearm” in the commission of an act of violence. His sentencing of 35 years ensures that he will not again be free until the year 2059.

“After two years of spewing antisemitic vitriol, the defendant planned and carried out a two-day attack attempting to murder Jews leaving synagogue in Los Angeles,” Garland said at the time. “Vile acts of antisemitic hatred endanger the safety of individuals and entire communities, and allowing such crimes to go unchecked endangers the foundation of our democracy itself.”

Follow Dion J. Pierre @DionJPierre.