The specific political distinction to which political actions and motives can be reduced is that between friend and enemy. [...]
The political enemy need not be morally evil or aesthetically ugly; he need not appear as an economic competitor, and it may even be advantageous to engage with him in business transactions. But he is, nevertheless, the other, the stranger; and it is sufficient for his nature that he is, in a specially intense way, existentially something different and alien, so that in the extreme case conflicts with him are possible. These can neither be decided by a previously determined general norm nor by the judgment of a disinterested and therefore neutral third party.
Only the actual participants can correctly recognize, understand, and judge the concrete situation and settle the extreme case of conflict. Each participant is in a position to judge whether the adversary intends to negate his opponent's way of life and therefore must be repulsed or fought in order to preserve one's own form of existence. [...]
The enemy is not merely any competitor or just any partner of a conflict in general. He is also not the private adversary whom one hates. An enemy exists only when, at least potentially, one fighting collectivity of people confronts a similar collectivity. [...]