Anything can become pathologized: if one pushes nationalism too far in the wrong direction, one can end up with bloody purges of “undesirable” groups, something I certainly condemn in the strongest possible terms. Moreover, as a self-proclaimed neo-reactionary, I freely acknowledge that the Liberal Nationalism referenced in this video was a profoundly de-stabilizing force in the great Austro-Hungarian Empire in particular.
On the other hand, today we are faced with a multicultural left-wing “Universalist” ideology which essentially functions as the counter-white coalition–or more accurately, I think, as the anti-white coalition. The essence of this is that the forces of the Left are more than happy to mobilize non-white identitarianisms (plural) against Western Whites.
I admire Orwell in many ways, but I think this formulation of his is fairly flawed. To my eye, patriotism and nationalism can become pathologically conformist in similar ways, and there is plenty of synergy in that nationalists generally see themselves as patriots.
With that said, nationalism can be valuable if your people have a valid interest or set of interests to express. Many people yearn for a world of perfect unity, a world without ‘tribalistic’ national rivalries, but this is a pipe dream: there will always be conflicting interests, and thus there will always be conflict. Given the threat the West faces from the left, right-populist nationalism tinged with identitarianism is essentially our last best hope.