I took my son to see Michael Moore live at the Roundhouse, in north London, before Christmas. The US radical and author of the best-selling book Stupid White Men was (mostly) clever, funny, angry, sharp, iconoclastic and sceptical about the lies and humbug processed by the US government and big business. Sure there were some flunked bits – you expect that, the troughs are part of the adventure, an evening with a well-worn rebel. What we did not expect was to feel so enraged at one point that we almost walked out. It was when Moore went into a rant...