Just the White Supremacists emboldened by their leader to resurrect the 1930s pogroms of the New Hitler/Der Fuehrer  Trump and his National Security Advisor Herr Bannon.  Start with a small non-christian minority to appease the Fundamentalist Racist Christians following Judaeo-Christian ethics, expand to Islamics and all immigrants while imposing martial law in all Black urban areas.  The 4th Reich in full flower.