Nationalism a curse or progress

Good luck to you! !! Firstly, my challenger (Taxidea) has given a weak opening argument without even conversing about how nationalism has brought progress in mankind for he is in favor of "Nationalism a progress". (As per rules of any debate, all citations must be quoted with the proper author name and articles, page numbers etc) Secondly due to lack of knowledge of my friend, he has criticized that " Instead of arguing that nationalism is the cause of all to the violence in the world you have drifted off into economics, individual countries, resources that are valued and some vague notion of what you believe capitalism to be. " (Taxidea). We are all here to learn and it may be that i will gain new knowledge when my friend posts a rebuttal, until then i would like my friend to read the articles below cited from which i came to the conclusion that nationalism and capitalism go hand in hand, complementing one another. 1. Tracing the Matrix of Nationalism and Capitalism by Kevin E. Schmiesing ( . http://www.acton.org... ) 2. Nationalism at the centre and periphery of Capitalism by Luiz Carlos Bresser-Pereira (. http://www.scielo.br...) 3. How Is Nationalism Related to Capitalism? by Gale Stokes- RICE University- Comparative Studies in Society and History, Volume 28, Issue 3 July 1986, pp. 591-598 (. https://www.cambridge.org...) 4. The Spirit of Capitalism, Nationalism and Economic Growth By Liah Greenfeld (. https://books.google.com.pk...) My friend here says, " To deny nationalism, in all of its forms, you are denying the very nature of human beings. Nationalism is no different than any other grouping with which people self-identify; whether it be religion, politics, sports teams, etc. . People have an obvious and overwhelming need to belong to a group. Groups offer a sense of identity, a feeling of security and a sense of comfort to its members" but he is indeed forgoing the fact that even though we identify ourselves with a group in-spite of that there is difference of opinion among them over several issues, nationalism is not the nature of Humans but rather difference of belief, outlook, perspective, attitude and perception of life and issues relating to it is the core of Human nature. Hence i say respecting each other's differences in mankind. Nationalism has divided us into such bits and pieces that basic Humanity is lost. My friend say's "People have an obvious and overwhelming need to belong to a group. Groups offer a sense of identity, a feeling of security and a sense of comfort to its members", I ask, what better group do you need to associate yourself with, the other person has the same two eyes, two legs, two arms and hands, a brain, ears but rather than focusing on our similarities, we prioritize on the differences and create divisions of the same species and outcast our own kind. This shows more of a sense of insecurity rather than security and sense of comfort. What is the fault of the person being born in a Black family for which he is outcast-ed in the society, treated as an inferior Human? What is the fault of a person being born in a Palestinian family for he and his family is blown to shreds by Israelis? What is the fault of a person being born in a poor family for he suffers in attaining the basic needs of life, food, cloth, shelter and health? It is this Evil, Nationalism which has been successfully and carefully implanted by some in Mankind to divide Humanity for their own greed and objectives. Let me speak in a way of parable, Do you see the birds, how they rise in the morning from their homes, leaving behind their young in the nest in search of food for themselves and their young , the same species of birds flying together in flocks, caring for their own kind and thus after a hard day's work return in the evening to nest for good night's rest? Same is for humans, the only difference here is that we humans of the same species do not flock together rather we hurt and even go to the extent of killing each other over material gains. Such is the sad story of Mankind for divisions between us has taken basic humanity away. We would rather hate than love, we would rather hoard than share and we would rather oppress than liberate Mankind.