Notes on Nationalism (1945)
orwellfoundation.com
orwellfoundation.com
Note that TFA clearly distinguishes between patriotism/partisanship, and what it labels as nationalism, which is (even —or maybe especially— in cases where the "nation" is not objectively definable?) so excessive as to cause the valence of an argument with respect to the "nation" to become more important than its actual plausibility.
I'm an American who loves Japanese culture. I am thrilled by any "nationalist" development there, since it will--hopefully--keep them Japanese, instead of becoming "America East." If they think my culture/history/religion/race sucks, fantastic. Diversity is our strength!