Christian terrorism is religious terrorism by groups or individuals, the motivation for which is typically rooted in an idiosyncratic interpretation of the Bible and other Christian tenets of faith. Christian terrorists draw upon Christian scripture and theology to justify violent political activities .
Beginning in the late nineteenth century, white supremacist Ku Klux Klan members in the Southern United States engaged in arson, beatings, cross burning, destruction of property, lynching, murder, rape, tar-and-feathering, and whipping against African Americans, Jews, Catholics and other social or ethnic minorities.[36]
During the twentieth century, members of extremist groups such as the Army of God began executing attacks against abortion clinics and doctors across the United States.
http://en.wikipedia.org/wiki/Christian_terrorism