Up to 300 people gathered in Markfield Park, north London last Saturday to protest against a violent Nazi attack that had taken place there.
Fascists from Polish group Zjednoczeni Emigranci attacked a free musical festival the previous weekend.
Unite Against Fascism (UAF) and Love Music Hate Racism organised the event. Speakers said that the Nazis are a tiny minority among the 14,000 Polish people who live in Haringey.
Campaigners will now be fighting for a music and cultural festival in the area.