The rise of hate speech is one of the most pressing social issues that world faces. Its sharp increase in Europe has led to social division, xenophobic behaviour as well as an increase in violence and hatred towards minority groups. The proliferation of hate is always damaging, but it has dire consequences in urban environments. Big cities have more segregated communities than small towns where close-knit neighbourhoods support a sense of common belonging. In Europe, with immigration pushing population growth in most cities, the rising level of hate speech has serious consequences for already isolated communities.