Saturday's mass shooting at the Tree of Life, a Pittsburgh synagogue, killed 11 people, including 4 police officers and a 97-year-old Holocaust survivor. It's the deadliest anti-Semitic attack in modern U.S. history, and it came after a week of racist and politically motivated right-wing violence. The shooter was reportedly fixated on the synagogue's work with refugee resettlement and fully bought into the racist conspiracy theories that American Jews are trying to flood the country with non-white, non-Christian voters. The president himself Donald Trump has been coyly promoting these ideas in recent weeks as he tries to gin up enthusiasm from his base for the midterm elections.

Trump, after suggesting that the synagogue should have had better security and that death penalty laws need to be "stiffened up" (note: Pennsylvania already has the death penalty and prosecutors are already seeking it for the shooter), said that he would be visiting Pittsburgh and Tree of Life.

Unsurprisingly, not everyone is excited for the announced visit. Former president of Tree of Life Lynette Lederman told CNN that she doesn't welcome Trump and that he's a "purveyor of hate."

However, the current president of the synagogue, Rabbi Jeffrey Myers has said that Trump is free to visit. This morning, he also told the Today Show that hate in the U.S. "just seems to be getting worse," before describing being in the building and hearing the shooter execute his congregants.

The Pittsburgh chapter of Bend the Arc, a progressive Jewish organization, has issued a stern letter to the president, calling out his lukewarm condemnations and empty gestures designed more to give him plausible deniability than to prevent political violence. The letter says he isn't welcome in Pittsburgh until he commits "to compassionate, democratic policies that recognize the dignity of all of us." It reads in part:

President Trump, you are not welcome in Pittsburgh until you fully denounce white nationalism.

Our Jewish community is not the only group you have targeted. You have also deliberately undermined the safety of people of color, Muslims, LGBTQ people, and people with disabilities. Yesterday’s massacre is not the first act of terror you incited against a minority group in our country.

President Trump, you are not welcome in Pittsburgh until you stop targeting and endangering all minorities.

The murderer’s last public statement invoked the compassionate work of the Jewish refugee service [Hebrew Immigrant Aid Society] at the end of a week in which you spread lies and sowed fear about migrant families in Central America. He killed Jews in order to undermine the efforts of all those who find shared humanity with immigrants and refugees.

President Trump, you are not welcome in Pittsburgh until you cease your assault on immigrants and refugees.

The Torah teaches that every human being is made b’tzelem Elohim, in the image of God.

This means all of us.

The White House has not yet shared any details about Trump's proposed visit.