The images coming out of Belfast overnight on Tuesday were shocking. Violent unrest erupted in the north of the city after a man was seriously injured in a knife attack and a Sudanese migrant was arrested on suspicion of attempted murder. British far-right agitators including Stephen Yaxley-Lennon (also known as Tommy Robinson) wasted no time in race-baiting. They encouraged angry white men and boys to take to the streets and vent their fury. Many did. I live in Belfast, and in a hark back to t