This bellend with the sign is not an anti-Zionist but an antisemite. People like this are racist and give us all real anti-Zionists a bad name. If you see him on any demos. make sure you make him feel very welcome by kicking him off the demo.
He also makes many anti-Zionist Jews feel uncomfortable by pushing his antisemitic tin-foil hat bullshit.
People like this are antisemitic, regressive and are exactly what the Zionists love. Show him that he is not welcome and spread this around.
(The Protocols of the Learned Elders of Zion is a proven fake by the way and the Talmud is only valid if you are religious and an adherent to Judaism which I suspect he and other antisemites are not)