At present, it seems that there are no primarily Christian nations in the world.
(With the probable exception of the Fire Nation - but none in The West)
Therefore - all nationalism is evil: as are all secular polities.
In other words, the only good nationalism is one that is secondary to Christianity. Which means that the nationalism must function within Christian priorities and a Christian framework. In other words, to be good, nationalism must be part of a Christian theocracy.
Yet, I believe that a Christian theocracy is not desirable in the West (as well as being in practice almost-certainly impossible).
This undesirability/ impossibility of Western theocracy is for reasons I have discussed ad nauseam on this blog, to do with the changed nature of Western Consciousness - that is changed motivations, a changed mode of thinking, a changed relationship to divine reality etc.
Western people don't want it, cannot be made to want it, will not choose it, and would not tolerate it if it were imposed. So that the result of trying to impose theocracy would not be a Christian society, but merely secular totalitarianism using Christianized language and excuses.
In the Western World now, the nationalists are would-be totalitarian bureaucrats, exponents of Ahrimanic evil (whether they espouse "Christian values, or not).
The nationalists oppose the globalists who are Sorathic agents of spitefully destructive evil.
And that is the choice within the political arena. A choice between variants of the dominant globalist destroyers, or a backlash of nationalist totalitarians: there are no Good choices available.
Disillusion is not wisdom; because dis-illusion (as the name implies) is a double-negative - not a positive - value; and Good comes only from a positive affiliation to God and divine creation.
At present I perceive increasing numbers of disillusioned totalitarian bureaucrats among the national leadership class - people who have noticed that their worked-for totalitarian New World Order is being destroyed by strategic chaos imposed by the dominating multi-national globalists.
So we are getting (and indeed have been getting, since around the millennium) some of the more intelligent and insightful adherents of totalitarian-Ahrimanic evil embracing a nationalist agenda to some extent. Putting themselves forward as a "common sense" alternative to literally-insane inversion of the Sorathic globalists.
But nationalism is evil. Historically, nationalism arose after the decline of Christianity: nationalism was the ideological basis of the first truly secular states.
What the globalists call the "far Right" - or populist Right, often tacitly supported by a majority of Western population - are actually "local totalitarians": those who want to have what they regard as a strong, productive, efficient nation - more like the Western societies of the middle 20th century.
This agenda would entail some sensible and common sense controlled and reduced immigration, a degree of meritocracy (instead of "inclusion" or "equality"), a protected and planned economy, coherent laws, effective military and police etc.
Sounds great, you say? Not so.
From where we are now; such a society is not just impossible, but would anyway be evil - because inevitably totalitarian.
It would not have Christian foundations, would not be organized in accordance with God's will and divine creation, nor would it be Christianly motivated.
Therefore what we would actually get would be a version of "the Great Reset" - but on a national basis; and without the self-destroying elements such as "sustainability", antiracism, and the rest.
At best and temporarily, such a society would assert justifications that are this-worldly, and utilitarian. But since such abstractions are both humanly-feeble and irredeemably subjective - very soon selfish, short-termist corruption among the leadership class would inevitably take-over.
(Which is why They are keen on the idea!)
What I am saying is that "nationalism" is a delusion or a deception for The West, arising only as a consequence of in-fighting among the demon-serving ruling class.
Serious Christians should be wary of falling into the trap of supporting nationalism - since it will inevitably be unmasked as local totalitarianism - hence intrinsically evil.