He had a great argument until he lost his cool. I give all the credit in the world to Piers' producer. What you saw in that interview was Jones come out with facts, numbers, and logic. At one point, Piers asks him what kind of gun was used in the separate shootings and Alex almost has it but then he goes into an ad hoc attack about people fleeing England, his charges at the Daily Mail, and then told him that if there was a boxing ring, he'd fight him.
What his producer did that was brilliant was drawing a line between him (the right) and the left by bringing in a Harvard professor that agreed with Piers right after and call what he had a "perverted version of history". Thus rectifying the gap between right and left. Crazy and educated. Extreme and logical. It's bullshit. It's theater. But.... brilliant.