TEL AVIV - A former Israeli spymaster has branded the country's leaders unfit to tackle the Iranian nuclear program because of what he called the "messianic feelings" behind their threats to launch a pre-emptive war on Iran. Other veterans have come out against Prime Minister Benjamin Netanyahu and Defense Minister Ehud Barak recently, but the criticism from former domestic intelligence chief Yuval Diskin was especially strong. "I have no faith in the prime minister, nor in the defense minister," Diskin, who stepped down as head of the Shin Bet a year ago, said in a speech partly broadcast by Israel Radio on Saturday. "I really don't have faith in a leadership that makes decisions out of messianic feelings." The catastrophic terms with which Netanyahu and Barak describe the prospect of a nuclear-armed Iran have stirred concern in Israel and abroad of a possible strike against a uranium enrichment program Iran says has peaceful ends. World powers have been trying to curb Tehran through sanctions and negotiations that are due to resume next month. Although Israel has threatened a pre-emptive strike if diplomacy fails, some experts believe that could be a bluff to keep up pressure on Iran, making it harder to interpret the swirl of comments from the security establishment. Diskin's remarks came days after Israel's military chief, Lieutenant-General Benny Gantz, said Iran was "very rational" and unlikely to build a bomb in the face of world opposition, apparently undermining the case for a strike.