BERLIN – German police raided offices of the country’s largest neo-Nazi group on Tuesday, searching for evidence that the organization is acting illegally against the constitution. The interior ministry said in a statement the large-scale operation in nine states began in the early morning hours against the “Help Organization for National Political Prisoners and their Families” (HNG), an association which supports right-wing extremists and their relatives.Deputy Interior Minister Klaus-Dieter Fritsche called the HNG a threat to society. The liberal Free Democrats, junior partners in the center-right government, have called for it to be banned as anti-constitutional.