The growing scholarship on ethnic diasporas has prompted various off-shoots. Two significant directions are the relationship of diasporas with globalisation and their role in the expansion and radicalisation of ethnic conflict. The corporate enthusiasm of the 1990s for globalisation has been followed by sombre reflections on its destructive impact upon a vast array of areas, including inter-ethnic relations worldwide. This article explores one crucial aspect of this wave of disruption*the rapid expansion of radical forms of long-distance nationalism, often leading to a stress on maximalist goals and an abdication of responsibility. It conceptually distinguishes between stateless diasporas and diasporas that conceive themselves as tied to, and represented by, an existing ‘nationstate’. Examples include ethnic lobbies from the former Yugoslavia, greater Han xenophobia among overseas Chinese, and Hindutva technocratic chauvinism among Hindu-Americans. Finally, the article identifies the onset of ‘online mobbing’ or ‘cyber bullying’ as a new and ominous trend in Internet radicalism.