When the mainstream of Western politics - both Left and so-called Right (neither of which are Christian) - are united in saying that there is a resurgent Western nationalism, you can be sure that this is not really happening.
Real, original, nationalism was a tremendously powerful, grass-roots, bottom-up kind of movement; a kind of mania or instinctual welling of emotion and desire that was so strong that (once the spark had been applied) it was very difficult, often impossible, to contain.
This original nationalism, running from the middle 19th to 20th centuries, was such a powerful motivator that men would risk their reputations, livelihoods and lives for it. Nationalism burned briefly, in any country it was active only for a generation or so; but while it lasted it inspired almost (but not quite) religious levels of motivation.
Indeed, Nationalism in Europe and among the European diaspora was precisely a replacement for lapsed Christianity - as was communism - nationalism was the first post-Christian generations seeking a meaning and purpose in life.
But real, genuine, powerfully-motivating nationalism is long-since dead... obviously! dead and gone and never to be revived. It was a flash in the pan.
So anybody who pins their hopes of a better world, of a reversal of Western self-hatred and strategic suicide, of an escape from Western decline toward extinction, on a revival of nationalism is going to be disappointed.
It won't happen.
In fact, my conviction is that all previous possibilities are closed-off. Despite that in many ways - including just sheer viability - the past was better than the present; I am sure that any previous form of organisation is impossible, for all sorts of reason - but mainly because that is not what God wants of us.
How do I know what God wants? Isn't that a claim of extraordinary arrogance and pride? Well, I am not going to try and persuade you; because knowing what God wants is something that everybody needs to experience for himself. I am merely telling you what I know - and that claim is not a reason why you should believe it...
Yet before rejecting as sinful pride any claim to know the mind of God on a subject, you need to consider what can be known about this world, in light of what all Christians know of the nature of God.
What God wants is an objective fact of being; and it is (surely?) inconceivable that God the creator and our Father would make things such that his wishes were hidden from his children? (From any of his children who genuinely want to know them.)
So it is my task - your, task, every Christian's task - to discover what God wants; in respect to everything that matters. Discover for yourself, by all means available - including by direct insight (true intuition, of the real self).
Because we are all Sons and Daughters of God we all 'inherit' something of the divine, and a fully-divine potential; and it is this inheritance that enables us to know God, to know God's mind - and to love God as a person.
So this kind of knowledge of 'what God wants' is not something restricted by anything other than our own limitations. In principle, it is open to any person - at least, nobody is excluded a priori. (The main exclusion is that people don't really want to know.)
Those whose hopes require a resurgent Western nationalism simply need to discover for themselves whether this is the proper and intended divine destiny of the West...
Not by trying to infer God's mind indirectly from 'the evidence'; but know directly, by sincere and honest prayer and meditation - and that ought to settle the matter; because the 'evidence' will then become simply understandable, in light of that knowledge.