“One of the most dangerous words is 'extremist'. A person who commits acts of violence is not an 'extremist'; he is a criminal. If he commits those acts of violence with the object of detaching part of the territory of the United Kingdom and attaching it to a foreign country, he is an enemy under arms. There is the world of difference between a citizen who commits a crime, in the belief, however mistaken, that he is thereby helping to preserve the integrity of his country and his right to remain a subject of his sovereign, and a person, be he citizen or alien, who commits a crime with the intention of destroying that integrity and rendering impossible that allegiance. The former breaches the peace; the latter is executing an act of war. The use of the word 'extremist' of either or both conveys a dangerous untruth: it implies that both hold acceptable opinions and seek permissible ends, only that they carry them to 'extremes'. Not so: the one is a lawbreaker; the other is an enemy.The same purpose, that of rendering friend and foe indistinguishable, is achieved by references to the 'impartiality' of the British troops and to their function as 'keeping the peace.'”

The British forces are in Northern Ireland because an avowed enemy is using force of arms to break down lawful authority in the province and thereby seize control. The army cannot be 'impartial' towards an enemy, nor between the aggressor and the aggressed: they are not glorified policemen, restraining two sets of citizens who might otherwise do one another harm, and duty bound to show no 'partiality' towards one lawbreaker rather than another. They are engaged in defeating an armed attack upon the state. Once again, the terminology is designed to obliterate the vital difference between friend and enemy, loyal and disloyal.</p><p>Then there are the 'no-go' areas which have existed for the past eighteen months. It would be incredible, if it had not actually happened, that for a year and a half there should be areas in the United Kingdom where the Queen's writ does not run and where the citizen is protected, if protected at all, by persons and powers unknown to the law. If these areas were described as what they are—namely, pockets of territory occupied by the enemy, as surely as if they had been captured and held by parachute troops—then perhaps it would be realised how preposterous is the situation. In fact the policy of refraining from the re-establishment of civil government in these areas is as wise as it would be to leave enemy posts undisturbed behind one's lines.</p>
Source: Speech to the South Buckinghamshire Conservative Women's Annual Luncheon in Beaconsfield (19 March 1971), from Reflections of a Statesman. The Writings and Speeches of Enoch Powell (1991), pp. 487-488