Yeah I don't actually believe that happened, nor do I believe that it's a "policy" of Left Focus to be anti-Jew (as you're implying). I've noticed over the years that more so than any other group, the SA campaigns against racism (it's on all of their banners and magazines lul). I'm sure a lot are anti-Zionists there, like myself, who are opposed to the Israeli occupation of Palestine. But anti-Jew? Yeah right.
The liberal side of things is hardly faultless anyway, with slogans like "Commies off campus" and calling one of the Left Focus people a "left wing cunt" or something of that nature.
One of the progressive punch candidates called me a facist, so it looks like nobody is faultless.