Spontaneous rallies opposing Matteo Salvini’s divisive rhetoric have captured imaginations. They offer a model that could be emulated elsewhere

For over a decade, the dominant theme in European politics has been the emergence of movements that seek to dramatise and exploit social divisions through crude and aggressive sloganeering. One of the trendsetters in this regard was the comedian Beppe Grillo, who in 2007 held an anti-establishment rally billed as “Vaffanculo Day” (Fuck-off Day). That mass protest in Bologna launched a populist wave in Italy, eventually leading to the rise of the anti-immigration politician Matteo Salvini, whose hard-right League party – currently out of government – is polling far ahead of its rivals.

Progressives have despaired at the apparent inability of centre-left politicians to find the vocabulary and imagination to challenge the divisive and often violent rhetoric of figures such as Salvini and Marine Le Pen. But help may be at hand, in the form of a burgeoning grassroots movement in Italy that takes the symbol of a fish as its inspiration. Appropriately, it began in Bologna.