Nov. 2 (Bloomberg) — The murder a year ago today of Dutch filmmaker Theo van Gogh, described as a “message in blood” by Prime Minister Jan Peter Balkenende, has widened the gap between religious communities and inflamed tensions, a survey shows. “We shouldn’t let ourselves be divided by a small group of people that writes its message in blood,” Balkenende said today at a commemoration service in the Amsterdam street where Van Gogh was shot. Murderer Mohammed Bouyeri said he killed to protect Islam. “Spurring hate is no solution,” Balkenende said. The murder of Van Gogh, 47, who made a