Selflessness can fuel ruthlessness toward others in conflicts. [causal]
On the other hand, however, the parties' consciousness of being mere representatives of supra-individual claims, of fighting not for themselves but only for a cause, can give the conflict a radicalism and mercilessness which find their analogy in the general behavior of certain very selfless and very idealistically inclined persons. Because they have no consideration for themselves, they have none for others either; they are convinced that they are entitled to make anybody a victim of the idea for which they sacrifice themselves. Such a conflict which is fought out with the strength of the whole person while the victory benefits the cause alone has a noble character; for the noble individual is wholly personal but knows nevertheless how to hold his personality in reserve.
DEFINE: Simmel's 'noble' conflict: wholly personal yet impersonal, sacrificing self so the cause victrols.
Georg Simmel, on individuality and social…, loc. 306