The understanding of internationalism is must in every debate on Nationalism.
The Left has never hidden the element of internationalism in its definition of nationalism. It has openly been a part of international communist movement and international civil rights movement. And the Right-Wing has often used this honest admission as stick to beat the left with.
However, the Right Wing has been absolutely dishonest about its deep rooted international moorings.
The left's problem is that it has shied away from exposing the international linkages of the Right-Wing groups. The left must expose the comprador character of the Right-Wing elite. It must show how the right wing elite is a part of the global capitalist class and how it is engaged in pauperizing its nation to appease its Western master.
The BJP govt is against NGOs that come from abroad and work in India but they have ignored the fact that their NRI friends of RSS in America are not Indian citizens. They have their careers to protect and their loyalty is with the nation that they are citizens of.
And knowing the reach of CIA one is sure that many of the American Friends of RSS must we working for Uncle Sam to perform acts ranging from communal riots to influencing elections in India with their money. This is not new in 1968 questions were raised in parliament about use of PL80 funds by CIA operatives to interfere in Indian elections.
The Right-Wing because of its its very class-allegiances is inherently anti-national and this must reach to the people.
The Left's also needs to be cautious in its assessment of forces that shape the international discourse. Many a times these forces, largely residing in the West, are the hand-maiden of imperialist forces. Therefore, these forces representing "international good" need to be thoroughly scrutinized.