People from Natalie Katzourin-Buchsbaum's synagogue in Elizabeth, N.J., have been shaken and nervous, she said, ever since a gunman killed 11 people at a synagogue in Pittsburgh last Saturday.
"Everyone was really on edge," she said. "And when these things happen, people are like, 'I'm not sending my kid to school,' or 'I'm not going to go to synagogue.'"
Katzourin-Buchsbaum, 36, said she understands that fear can make people withdraw from their normal routines. But when she saw posts about #ShowUpForShabbat on social media, it made her hopeful.
The hashtag, started by the American Jewish Community, calls for people of all faiths to come together for Shabbat services on Friday and Saturday. The effort aims to bring together people from across the Jewish community and non-Jews following the violent attack on the Tree of Life Synagogue.
The inclusive gesture is not insignificant. The man charged with carrying out the shooting, Robert Bowers, was an outsider with a history of expressing deeply anti-Semitic sentiments.
"To some people I feel like it could be scary," said Katzourin-Buchsbaum. "It's like, 'Oh now we're inviting everyone to come, we don't even know who's coming in, we really have to amp up security and be cautious. But at the same time, it's showing that no, we're not going to be afraid."
For non-Jews, the hashtag was an invitation to stand by friends and neighbors in a time of mourning and fear.
Sabeeha Rehman is a Muslim author and interfaith activist who lives on the Upper East Side. Since the shooting in Pittsburgh, she said she's been grieving.
"I cannot distance myself from [the attack] because my Jewish friends, and sisters and brothers and cousins in faith [are] hurting and are scared," she said.
Although she's currently focused on showing support for people of the Jewish faith, Rehman said solidarity is often reciprocal. She remembers seeing Jewish groups stand with Muslims in New York when the Trump administration rolled out its travel ban in January.
Rehman says it is now her turn to be present for them. She and her husband plan to split up on Friday evening and Saturday so they can attend numerous Shabbat services all over the city.
Mary O'Shaughnessy, 54, said she plans to attend Shabbat with one of her friends on the Upper West Side. Raised in a Catholic household by a father who served in World War II, O'Shaughnessy said the recent shooting was profoundly tragic and wrong.
"People died in a synagogue, praying. That is not what my father went to France for. That is not what my grandparents came from Ireland for," she said, "that someone would be shot in a place of peace."