In the 1970s and 1980s some Students’ Unions took the United Nations-approved idea that Zionism is a form of racism, combined it with the National Union of Students’ policy of ‘No Platform’ for racists, and used it to ban Jewish Societies or restrict their activities on British campuses. This talk will describe these campus battles between Zionist and anti-Zionist activists, both of whom claimed to be opposing racism. In so doing, it will explore the origins of New Left anti-Zionism and its relationship to the idea of a ‘new antisemitism’.