The French government's opposition to a war on Iraq is strongly supported by most people living in France. That includes some five million Muslims, many of them ethnic Arabs, who comprise almost 10 percent of the country's population. These Muslims, along with France's long-standing interests in the Middle East, may help explain President Jacques Chirac's call for a diplomatic solution to the crisis. Hamid Kaci, 31, who owns a dry-cleaning shop in northern Paris. is a strong supporter these days of France's conservative president, Jacques Chirac. Mr. Kaci, who was born in the region of Kabylia in northern Algeria, does...