The PM's speech on the theme of state multiculturalism having failed appeared to strike a chord, especially the part about where a 'live and let live' approach, respecting other cultures and traditions, becomes a 'let's not complain for fear of causing offence'... I paraphrase. Is it a confusion of identity that leads to events like the 7/7 bombing? A lack of social cohesion? An overromanticised notion of 'the old country'? Something else?