What is the fine-grained topic of the following text: But because the proletariat can only learn the lessons of history through its own experience in the historical process, communists can only analyse the national question in historical terms, in order to establish why it is that opposition to all nationalisms and national struggles has become one of the class lines separating proletarian from bourgeois organisations. Only return the topic.
Analysis of Nationalism and National Struggles in Proletarian and Bourgeois Organizations