Mark Potok, senior fellow at the US-based non-profit civil rights organisation Southern Poverty Law Centre which monitors white supremacist and other hate-groups in America, is convinced that Wade Michael Page targetted innocent Sikh worshippers in the Oak Creek, Wisconsin, believing they were Muslims.
There has been an "enormous growth in the radical right" in the United States over the last three years, believes Mark Potok, senior fellow at the Southern Poverty Law Centre, a much-respected non-profit civil rights organisation based in Montgomery, Alabama.