Originally Posted by Katczinsky

That video was recorded and released by a team of scientologists that had been following and spying on John Sweeney and the BBC crew for some days. Watch the actual Panorama show here, which includes the outburst toward the end in it's context:

Panorama - Scientology and Me

The person he yelled at was the individual dressed in black that kept following him and spying on him, and approaching him to attack him and the people he was interviewing. After seeing that, if I were in Sweeny's position, I don't think I can say for sure that I wouldn't have punched him in the face as opposed to just yelling at him.

Scientologists have to be the nastiest group of people I've ever seen.