When Rabbi Victor Gross was looking for a home to grow his congregation in Boulder, CO, he knew he didn't want a dedicated building. It wasn't just the cost, but the environmental impact of operating a space that's only used a few hours a week. Instead, he looked for a church to rent out Friday evenings and Saturday mornings. He asked church leaders two questions: Was the church open and affirming to everyone? And could the churchgoers and clergy not proselytize to Jews?

After many honest rejections, they found a partner in a Lutheran church, establishing a concrete example of what's been dubbed "deep ecumenism". It's a level beyond interfaith work that sees members of different religious communities dialoguing, working together and praying in the same space—a true form of acceptance and tolerance.

This is just one way of drastically reimagining the future of not just Judaism, but all organized religions, as many synagogues shutter and congregations dwindle across the world. Rabbi Gross joins his former student, Ralph Benmergui, on Not That Kind of Rabbi to explain more about deep ecumenism and how religion can be used as a force of unity—rather than division.