The CHRONICLE OF HIGHER EDUCATION recently ran a column on the event. In that column they reported on objections to Horowitz's presentation from the audience, highlighting remarks made by Barbara Foley and Grover Furr. According to the CHRONICLE, Furr said that he objected to Horowitz's presence on the panel not because of Horowitz's ideology, but "because he is a liar."
In his usual thoughtful and temperate way, Horowitz responded by bragging that he "was in the Civil Rights Movement before Barbara Foley was born."
Without outing Barbara's birth certificate, suffice it to say that Horowitz thereby proved Gordon Furr's point.