The heads of the military and the secret services, the judiciary and top police officers are not elected. They are not accountable in any way, just as no one elects heads of multinational corporations like Rupert Murdoch. Wars like the First World War or the American war in Vietnam were not in the interests of everyone in Britain or the United States. They were in the interests of a small number at the top. Defending the existing state is as much part of Labour Party history as it is part of Tory history.
History is full of politicians who have accused protesters of being anti-democratic.
But the truth is the opposite. The protesters throughout history are generally the ones who are fighting for more democracy. So the Chartists demonstrated for the right to vote, as did the Suffragettes. Workers were forced to protest for the right to be in a union and to organise at work, and have been forced to march and strike to defend that right many times since. In more recent years people have taken to the streets against laws like the Criminal Justice Act which have given the state even more powers to snoop and clamp down on people.