Depende. Você acredita que as pessoas têm o direito de defender suas propriedades com força letal? Porque foi o que aconteceu.
Then Fëanor grew wrathful, for he still feared delay; and hotly he spoke to Olwë. ‘You renounce your friendship, even in the hour of our need,’ he said. ‘Yet you were glad indeed to receive our aid when you came at last to these shores, fainthearted loiterers, and wellnigh emptyhanded. In huts on the beaches would you be dwelling still, had not the Noldor carved out your haven and toiled upon your walls.’
But Olwë answered: ‘We renounce no friendship. But it may be the part of a friend to rebuke a friend's folly. And when the Noldor welcomed us and gave us aid, otherwise then you spoke: in the land of Aman we were to dwell for ever, as brothers whose houses stand side by side. But as for our white ships: those you gave us not. We learned not that craft from the Noldor, but from the Lords of the Sea; and the white timbers we wrought with our own hands, and the white sails were woven by our wives and our daughters. Therefore we will neither give them nor sell them for any league or friendship. For I say to you, Fëanor son of Finwë, these are to us as are the gems of the Noldor: the work of our hearts, whose like we shall not make again.’
Thereupon Fëanor left him, and sat in dark thought beyond the walls of Alqualondë, until his host was assembled. When he judged that his strength was enough, he went to the Haven of the Swans and began to man the ships that were anchored there and to take them away by force. But the Teleri withstood him, and cast many of the Noldor into the sea. Then swords were drawn, and a bitter fight was fought upon the ships, and about the lamplit quays and piers of the Haven, and even upon the great arch of its gate.
(Silmarillion)
Nesse caso, os Noldor estavam inteiramente em falta. Se não, então talvez você possa dizer que Teleri estava em falta, pois eles responderam com força indevida ao roubo: eles poderiam simplesmente ter desembarcado com os Noldor a bordo e deixá-los partir, a menos que "com força" signifique Feanor imediatamente começar a matá-los em vez de lidar com eles quando se recusaram a sair.
Suspeito que, no universo de Tolkien, os Teleri estivessem certos, pois não ouvimos histórias ou sugestões. Estou ciente de que suas ações em defesa de seus navios foram desaprovadas pelos Valar. De fato, Uinen pelo menos os vingou em parte, e logo após o Doom of the Noldor foi anunciado:
‘Ye have spilled the blood of your kindred unrighteously and have stained the land of Aman. For blood ye shall render blood, and beyond Aman ye shall dwell in Death's shadow.
(Silmarillion)