I don't know about that. The author of the book, Eric Blanc, also wrote an article called "The Rosa Luxemburg Myth: A Critique of Luxemburg’s Politics in Poland (1893–1919)" and in it he argues that

This article challenges widespread uncritical portrayals of Rosa Luxemburg. By examining the politics and practices of Luxemburg and her SDKPiL party in Poland, I show that their commitment to proletarian emancipation was undermined by sectarian and doctrinaire tendencies that contributed to the defeat of Poland’s workers’ revolutions in 1905 and 1918–19. A critical analysis of their approaches to the national question, the Polish Socialist Party, German Social Democracy, and the role of the revolutionary party, undermines the prevailing romanticisation of Luxemburg. I argue that the Polish Socialist Party, Luxemburg’s main political rival, posed a viable Marxist alternative for Poland’s revolutionary movement.

So I don't think Luxemburg's actions were necessary