WHEN Geert Wilders, a Dutch politician, collected his post from the letterbox on Wednesday he got an unpleasant surprise. Among the bills and junk mail was a letter addressing him as “ugly dog”. It told him he would soon be beheaded. It was an unnerving way to start the day. Only 24 hours earlier Theo van Gogh, the film maker who had often attacked radical Muslims, had been riding along on his bicycle when a Muslim fanatic first shot and then butchered him on a busy street with the nonchalance of an abattoir worker.