After reports of the massacre and kidnapping of Israeli Jews by Hamas militants, the two exchanged texts.

“How are you holding up?” Ms. Hasan wrote, before expressing anger that such atrocity could be done in the name of God, and fear of a violent retaliation that would take innocent lives.

“I love you,” she continued. “I am sorry. I am here.”

Ms. Hodos was reeling. Her son had a friend who was taken captive. Her husband was once an Israeli soldier. Decades ago, he had fought during a war with Lebanon. The shock and pain she felt was so profound that at first, she struggled to find the right words, so she replied by sending poems about the grief of loss during war.

“So much gratitude to have your partnership,” she wrote. Her heart ached for Israel, but she needed to make it known that her care was not limited by borders. “I’m so worried about everyone in Gaza for what is ahead.”

As the war and atrocity spread over the coming days, both women struggled against depression, nausea and sleeplessness. They were unable to eat.

They pressed on, appearing at mosques and synagogues and gathering with friends of their faith in their respective homes.

“More people are reaching out to each other than I’ve ever seen,” said Ms. Hasan. “I think that’s the result of the relationships we’ve built all these years. Without that connection, one person becomes defensive in a discussion, and whoever they are speaking with from the other side entrenches and gets defensive back quickly. When there’s a relationship, there are moments of softening that allow a little more slack in the discussion and a little more care.”

The NewGround gathering at the park west of downtown Los Angeles was such a moment.

A solemn, grieving apprehension took hold as the two friends welcomed the group. Israel had spent days bombing targets in Gaza, an act of retribution for Hamas’s attack that was causing a humanitarian disaster.

For a long while, members of NewGround gathered in five or six small clusters, people of both faiths mixing as slivers of anguished conversation filled the air.

“I know Israelis who are going from funeral to funeral for children of their friends.”

“I know people in Gaza who have lost loved ones.”

“My children are scared, and I don’t know what to say.”

“My generation has to make something different for the next. We don’t have to repeat the hurt on both sides.”

An hour passed. Then two. Everyone ended up sitting together in a circle. Side by side, knee to knee, Ms. Hasan said her prayer and Ms. Hodos sang.

The sun went down. The sky turned black. For a while, there was a peaceful silence.