Greek Prime Minister Antonis Samaras on Thursday said he would not allow neo-Nazi party Golden Dawn to \"undermine\" democracy after one of its alleged supporters fatally stabbed a popular anti-fascist musician. \"This government is determined not to allow the descendants of the Nazis to poison our social life, to commit crimes, terrorise and undermine the foundations of the country that gave birth to democracy,\" Samaras said in a televised address.