A modified version of the Pittsburgh Steelers' logo has been used to show support for the victims of the shooting.

An LGBTQ organization said that yesterday’s shooting at a Pittsburgh synagogue happened during the Briss of a set of twins adopted by a gay couple.

The Delta Foundation of Pittsburgh posted on Facebook, “We were just informed that this morning’s tragedy was happening during a Briss for a set of twins adopted by a gay couple.”

“We have witnessed the worst of America this morning in our town Pittsburgh,” the post continued. “More than ever we must come together as people and change the temperament of our country.”

On Saturday, Robert Bowers allegedly entered the Tree of Life synagogue with an AR-15 assault rifle and three handguns.

He shot dead eleven people and injured six others, and witnesses said he shouted, “All Jews must die.”

As he was leaving, he got into a shoot-out with SWAT officers, and ultimately surrendered and was arrested.

He is dozens of charges related to homicide and violence against police officers, with hate crimes enhancements.

If convicted of the hate crimes charges, Bowers faces the death penalty.

Bowers had an account on the social media site Gab, which is popular with white supremacists.

Just before the shooting, he wrote a message saying that the Hebrew Immigrant Aid Society “likes to bring invaders in that kill our people.”

“I can’t sit by and watch my people get slaughtered. Screw your optics, I’m going in,” he wrote.

An FBI affidavit said that after the shooting, he told police “I want to kill Jews” because they “were committing genocide against his people.”

Donald Trump took the shooting as an opportunity to call for the US to “stiffen up our laws of the death penalty.”

“These people should pay the ultimate price. This has to stop,” he said, despite the fact that the death penalty could already be applied in this case.

He also denounced calls for laws to reduce gun violence. “If they had protection inside, maybe it could have been a different situation,” Trump said.

Pittsburgh mayor Bill Peduto pushed back on the idea that the synagogue would have been safe with armed security.

“The idea that we as a country have evolved to place where every church, synagogue or mosque will need to have armed security is wrong. I would rather tackle the issues that led to this incident,” he said

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