Readers perusing the Los Angeles Times, Variety or the Hollywood Reporter earlier this month would have stumbled upon a curious sight: a full-page advertisement signed by 84 actors, producers, directors, writers and other Hollywood types condemning terrorism. Originated by actress Nicole Kidman, the signatories included William Hurt, Danny DeVito, Michael Mann, Bernie Mac, Sam Raimi, Michael Douglas, Vivica Fox, Sylvester Stallone and Ridley Scott. The advertisement focused on the recent conflict in the Middle East and deplored civilian casualties in both "Israel and Lebanon." But it laid the blame squarely on Hamas and Hezbollah for initiating the violence, as well...