The gunman who stormed a synagogue in the heart of Pittsburgh’s Jewish community and killed 11 worshippers will be sentenced to death for perpetrating the deadliest antisemitic attack in American history.

Robert Bowers spewed hatred of Jews and espoused white supremacist beliefs online before methodically planning and carrying out the 2018 massacre at the Tree of Life synagogue, where members of three congregations had gathered for Sabbath worship and study. Bowers, a truck driver from suburban Baldwin, also wounded two worshippers and five responding police officers.

The same federal jury that convicted the 50-year-old Bowers on 63 criminal counts recommended Wednesday that he be put to death for an attack whose impacts continue to reverberate nearly five years later. He showed little reaction as the sentence was announced, briefly acknowledging his legal team and family as he was led from the courtroom. A judge will formally impose the sentence later.

Jurors were unanimous in finding that Bowers’ attack was motivated by his hatred of Jews, and that he chose Tree of Life for its location in one the largest and most historic Jewish communities in the United States so that he could “maximize the devastation, amplify the harm of his crimes, and instill fear within the local, national, and international Jewish communities.” They also found that Bowers lacked remorse.

The family of 97-year-old Rose Mallinger, who was killed in the attack, and her daughter, Andrea Wedner, who was shot and wounded, thanked the jurors and said “a measure of justice has been served.”

“Returning a sentence of death is not a decision that comes easy, but we must hold accountable those who wish to commit such terrible acts of antisemitism, hate, and violence,” the family said in a written statement.

The verdict came after a lengthy trial in which jurors heard in chilling detail how Bowers reloaded at least twice, stepped over the bloodied bodies of his victims to look for more people to shoot, and surrendered only when he ran out of ammunition. In the sentencing phase, grieving family members told the jury about the lives that Bowers took — a 97-year-old woman and intellectually disabled brothers among them — and the unrelenting pain of their loss. Survivors testified about their own lasting pain, both physical and emotional.

Through it all, Bowers showed little reaction to the proceeding that would decide his fate — typically looking down at papers or screens at the defense table — though he could be seen conversing at length with his legal team during breaks. He even told a psychiatrist that he thought the trial was helping to spread his antisemitic message.

It was the first federal death sentence imposed since President Biden, whose 2020 campaign included a pledge to end capital punishment, took office. Mr. Biden’s Justice Department has placed a moratorium on federal executions and has declined to authorize the death penalty in hundreds of new cases where it could apply. But federal prosecutors said death was the appropriate punishment for Bowers, citing the vulnerability of his mainly elderly victims and his hate-based targeting of a religious community. Most victims’ families said Bowers should die for his crimes.

Bowers’ lawyers never contested his guilt, focusing their efforts on trying to save his life. They presented evidence of a horrific childhood marked by trauma and neglect. They also claimed Bowers had severe, untreated mental illness, saying he killed out of a delusional belief that Jews were helping to cause a genocide of white people. The defense argued that schizophrenia and brain abnormalities made Bowers more susceptible to being influenced by the extremist content he found online.

The prosecution denied mental illness had anything to do with it, saying Bowers knew exactly what he was doing when he violated the sanctity of a house of worship by opening fire on terrified congregants with an AR-15 style rifle and other weapons, shooting everyone he could find.

The jury sided with prosecutors, specifically rejecting most of the primary defense arguments for a life sentence, including that he has schizophrenia and that his delusions about Jewish people spurred the attack. Jurors did find that his difficult childhood merited consideration, but gave more weight to the severity of the crimes.

Bowers blasted his way into Tree of Life on Oct. 27, 2018, and killed members of the Dor Hadash, New Light and Tree of Life congregations, which shared the synagogue building.

The victims were Joyce Fienberg, 75; Richard Gottfried, 65; Rose Mallinger, 97; Dr. Jerry Rabinowitz, 66; brothers David Rosenthal, 54, and Cecil Rosenthal, 59; Bernice Simon, 84, and her husband, Sylvan Simon, 86; Dan Stein, 71; Melvin Wax, 87; and Irving Younger, 69.

Bowers, who traded gunfire with responding officers and was shot three times, told police at the scene that “all these Jews need to die,” according to testimony. Ahead of the attack, he posted, liked, or shared a stream of virulently antisemitic content on Gab, a social media platform popular with the far right. He has expressed no remorse for the killings, telling mental health experts he saw himself as a soldier in a race war, took pride in the attack and wished he had shot more people.

In emotional testimony, the victims’ family members described what Bowers took from them. “My world has fallen apart,” Sharyn Stein, Dan Stein’s widow, told the jury.

Survivors and others affected by the attack will have another opportunity to address the court — and Bowers — when he is formally sentenced by the judge.

The synagogue has been closed since the shootings. The Tree of Life congregation is working on an overhauled synagogue complex that would house a sanctuary, museum, memorial and center for fighting antisemitism.