Ahem, excuse me - the clip you provided from the interview came nowhere near "anti-Zionism inevitably leads to antisemitism" as the Wiesenthal Centre believes Fischer said. Fischer seems to be saying he took this path himself (bizarre though it seems), but he disavows it as being general.
And, while the SWC has done a great deal of good work over the years (or had done before it parted from its founder?), it's fitness as an RS for what people say is blown away by, just as a for instance, Cecilie Surasky here. talk