John 12:31 Now is the time for judgment on this world; now the prince of this world will be driven out.
When you think about it, a blind squirrel would be able to smell where the acorns are, so I'm not sure that this idiom is all that useful. Nevertheless, it came to mind when thinking about this verse. How's that you ask? A valid question. When thinking about the need to remember that Satan has power within this present age, that the kingdoms of this world cannot be sanctified or holy because of that power (and human nature), it made me think of those groups who view government with a jaundiced eye because of that evil influence, which led my mind to the Jehovah's Witnesses. Now, the Jehovah's Witnesses refuse to participate in government because they believe that we are already living in the End Times and thus the world's governments, even your local school board, are controlled by Satan. This belief makes them unlikely candidates to support a 'Christian' Nationalist movement, {That they're a cult and not a part of Christianity being another reason} just for the wrong reasons, hence the blind squirrel. That may have been a long journey for a short reward, but hopefully it has you thinking about the connection between human governments and institutions and Satan. While it is not Christian orthodoxy that they are controlled by Satan, which would necessitate the sort of withdrawal enacted by the JW, it is in keeping with a proper Christian worldview to remember that both corrupted human nature and the influence of spiritually evil powers exists within all human created institutions including governments.
The tie in with 'Christian' Nationalism is thus a fundamental one. It goes to the heart of the question of whether or not a "Christian Nation" is even possible in any generation with any form of government. The answer, when considering these limitations (not to mention Jesus' lack of endorsement of any such project) is a definitive, "No". Thus 'Christian' Nationalism is working against reality, trying to complete a project and erect a system that is impossible given the prevailing conditions. It isn't about hope, it isn't about effort, it isn't about zeal or sacrifice, it just won't work, period. When Christ returns, when he sets up his kingdom here on earth, everything will change, until then we've been given a more a more important mission than trying to build a house of cards.