At first glance, the life of Seifeddine Rezgui appeared to be like that of any other young Tunisian man. An avid football fan, his family have described the 23-year-old as a young man who enjoyed all the trappings of Western society. A supporter of Real Madrid, Rezgui loved breakdancing and sitting in cafes chatting with friends. But beneath the veneer of normality, a radicalism was brewing which erupted on Friday with the massacre of 38 people on a Tunisian beach. Today more details of his character have emerged - including a video of a teenage Rezgui breakdancing - which offer a sharp contrast to a murderous state of mind.