(JTA) — A marketing firm that has worked extensively with Jewish nonprofits has declined to work with one because of growing concerns among its staff members about groups with “significant programming in Israel.”

The Shalom Hartman Institute, a leading Jewish educational think tank, reached out to Big Duck, a Brooklyn-based worker-owned cooperative, because of Big Duck’s history of working with Jewish organizations in the past.

But Farra Trompeter, Big Duck’s co-director, told Dorit Rabbani, Hartman’s North America communications director, last week that the firm would not work...