Defense industry twice as lucrative than S&P 500

Despite S&P 500 having 30 percent in growth the past two years the defense industry is twice as lucrative, "Dow Jones U.S. Aerospace and Defense Total Stock Market Index has grown at double the rate of the S&P, increasing in value by 60 percent." With the continued spread of the War on Terror it is unlikely such booming business will stop. Certainly there must be some in that industry of "defense" who have no interest in peace.