ALEXANDRIA, Egypt When stumping through the port city of Alexandria, whose crumbling mansions and rickety tram lines evoke long-faded glory, Sobhe Saleh of the Muslim Brotherhood vowed he had a different vision for Egypt's future. "If Islam were applied, no one would be hungry," he roared recently to a crowd of fully veiled women ululating with joy. "Islam is a religion of construction. Islam is a religion of investment. Islam is a religion of development." Religion, in fact, should profoundly alter both Egypt's domestic and foreign policy, said Mr. Saleh, a 52-year-old lawyer with a clipped helmet of steel-gray hair....