How the Belfast stabbing was the spark to a fuse loaded with grievance and provocation

Politicians, social media and far-right agitators convinced people that migrant-targeting violence would solve all their problems

Within minutes of the footage going online - of a Black man stabbing a white man - there was a sense of inexorability to what came next in Northern Ireland.

The grievances, the social media platforms, the politicians' doublespeak and the international cheerleaders all provided a fuse. On Monday night came the spark.