That is an incredibly unprofessional response from Shelley Rubin. Either that or she's naive enough to think that chat logs can't be faked. To assume that that sort of thing is true without checking the source or with the accused gives them less credibility in my eyes.
That said, I certainly hope that they would learn a lesson from this and respond more professionally with some inquiry into those sorts of complaints in the future. I, for one, would not be on this site if anti-semitism were permitted.
Dennis