More than 44,000 people have signed an open letter from progressive Jewish leaders saying President Trump Donald John TrumpBiden says voters should choose who nominates Supreme Court justice Trump, Biden will not shake hands at first debate due to COVID-19 Pelosi: Trump Supreme Court pick 'threatens' Affordable Care Act MORE is not welcome in Pittsburgh until he denounces white nationalism.

Eleven members of the Pittsburgh affiliate of Bend the Arc: A Jewish Partnership for Justice penned a letter to Trump following Saturday's shooting at the Tree of Life synagogue that left 11 congregants dead.

They invited others to sign the letter.

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“Our Jewish community is not the only group you have targeted,” the group wrote in its letter. “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.”

The mass shooting was considered the deadliest anti-Semitic attack in U.S. history.

"President Trump, you are not welcome in Pittsburgh until you stop targeting and endangering all minorities," the letter reads. "President Trump, you are not welcome in Pittsburgh until you cease your assault on immigrants and refugees."

White House press secretary Sarah Huckabee Sanders on Monday announced that Trump and the first lady on Tuesday will travel to Pennsylvania to meet with victims' families "to express the support of the American people."

The president and the White House have condemned the attack as anti-Semitic, but critics have said the condolences are not enough. Democrats and progressive activists have blamed the president's aggressive rhetoric.

Before the massacre, the alleged shooter posted on social media about the so-called caravan of Central American migrants slowly making their way to the U.S. border. Trump on Monday referred to the caravan as an "invasion."

Republicans and others have said the only person at fault is the gunman.

"I don't really foist blame upon any person," Tree of Life Rabbi Jeffrey Myers said on CNN. "Hate does not know religion, race, creed, political party."

The open letter calls on the president to commit to "compassionate, democratic policies that recognize the dignity of all of us."