Great question, @ Vincent .
The madness is in the method, not the goal.
The crime is using satan's means while claiming to serve God's purposes. Jesus was crystal clear about this; he said ***"Not so among you"*** when his disciples proposed exercising political power ("lording it over one another," precisely the nationalism thing "the ***ἄρχοντες τῶν ἐθνῶν*** [the rulers of the nations/gentiles] love to do"). (Matthew 20:25)
Jesus taught another way, completely apolitical, 100% voluntary, characterized by love and cooperation and cheerful giving and service. It begins with the inner change and submission to the Father he taught us in the Sermon on the Mount, the heart of which is the Lord's Prayer, and which teaches us to seek as of primary importance God's Kingdom, NOT nation-state kingdoms which operate on godless principles of theft and violent oppression.
For further reading, and please ask questions and dialogue with me:


PeakD
'The Kingdom of Jesus/God/The Heavens' - My Library Shelf | PeakD
A collection of articles challenging prevailing views of the relationship between the church and ersatz civil government... by creatr