MANAMA, Bahrain — The top Shiite politician in Bahrain Saturday said that last week's crackdown on Shiite protesters has destroyed a decade of stable sectarian relations.Bahrain, home to the US Navy's Fifth Fleet, has experienced daily clashes for over a week between Shiite protesters and Sunni-dominated security forces.Sheik Ali Salam, the head of Wefaq society, the largest Shiite bloc in parliament, gave the first public reaction to the arrests in a press conference Saturday.A government statement issued Saturday blamed insurgents for trying to disrupt the country's security.