Indonesia has so many problems on its back but yet, the one it wishes to pursue is a meaningless allegation that Malaysia has stolen the folk song of Rasa Sayang from Indonesia, if that is possible at all. It would be like the Brits accusing the US of stealing Twinkle Twinkle Little Star from the people of Great Britain!
It is unfortunate how some people fail to recognize that the history of this region did not develop separately before the signing of the Anglo-Dutch Treaty of 1824 and subsequent inorganic political demarcations that made possible the formation of modern states such as Malaysia and Indonesia, among others, in the 20th century. This historical development means that there are shared cultures between various countries in Southeast Asia, especially between Malaysia and Indonesia.
Are Indonesian nationalists too blind to see that?