The following things need to be retained:
 A fuller quotation of Horowitz that conveys his charges and stated implications to Dees.
 In fairness and to accomodate NPOV, a balancing fuller quotation of Berlet would also be needed.
 Reference to the allegations by Arabia against Berlet's style of argument - e.g. critique for guilt by association and critique for squashing free speech.
 Specification of how the dispute actually concluded - not simply "see here." For example, it should be noted that SPLC stood by Berlet and Berlet responded, plus Horowitz's counterresponse. The fairest way of doing this is again to give both Berlet and Horowitz a representative quote in their own words.