Among the political and public-policy figures signing the letter are former UK Prime Minister Boris Johnson; former Canadian Minister of Justice and Attorney General Irwin Cotler; former UK Cabinet minister Nadhim Zahawi; former U.S. Secretary of Veterans Affairs Robert Wilkie; former senior U.S. diplomat Elliott Abrams; and former White House Council of Economic Advisers Chair Jason Furman. They are joined by prominent scholars, historians and intellectuals, including Harvard professor Steven Pinker; historian Benny Morris; historian Sir Niall Ferguson; Ambassador Deborah Lipstadt, University Distinguished Professor at Emory University and former U.S. Special Envoy to Monitor and Combat Antisemitism; former Yad Vashem Chief Historian Dina Porat; Yossi Klein Halevi, Author and Senior fellow at the Shalom Hartman Institute; Brandeis University Professor Emeritus Jonathan D. Sarna; historian Simon Sebag Montefiore; historians Jeffrey Herf and Norman Goda; UCLA professor Judea Pearl; author Ayaan Hirsi Ali; Professor of History and Judaic Studies at Binghamton University Jonathan Karp; and urban-warfare expert John Spencer.

The letter also includes leading figures from film, television, music and media, among them Haim Saban; former Paramount Global Chair Shari Redstone; former Paramount Pictures CEO Sherry Lansing; Spyglass Media Group Chairman and CEO Gary Barber; Tribeca Enterprises co-founder Jane Rosenthal; producers Lawrence Bender and Susan Rovner; Fernando Szew, Head of Studio, Fox Entertainment Studios; Propagate Content executives Ben Silverman and Howard Owens; entertainment attorney and investor Kevin Yorn; Sharon Osbourne; actors Debra Messing, Jennifer Jason Leigh, Anthony Edwards, Mayim Bialik, Dame Maureen Lipman, Patricia Heaton and Jerry O’Connell; Mad Men creator Matthew Weiner; The Marvelous Mrs. Maisel creator Amy Sherman-Palladino; House creator David Shore; authors Dara Horn and Howard Jacobson; and music industry heavyweights Julie Greenwald, Bob Ezrin, John Ondrasik, David Draiman, Boy George, Paul Kemsely, and Billy Mann.

The coalition also includes major Jewish organizations and religious and communal leaders. Signatories include the Anti-Defamation League (ADL) and the American Jewish Committee (AJC); Rabbi Warren Goldstein, Chief Rabbi of South Africa; William Daroff, CEO of the Conference of Presidents of Major American Jewish Organizations; Jonathan Greenblatt, CEO of ADL; Ted Deutch, CEO of AJC; Yonathan Arfi, President of Conseil Représentatif des Institutions juives de France (Crif); Rabbi Abraham Cooper of the Simon Wiesenthal Center; Alex Ryvchin, co-CEO of the Executive Council of Australian Jewry; and Soraya Deen, founder of the Muslim Women Speakers Movement.