Lutherans are confessionally bound to be Christian Nationalists:

‘The chief members of the Church, the kings and princes, should especially guard the interests of the Church. They should see to it that errors are removed and consciences are healed (i.e., rightly instructed). God specifically warns kings, “Now therefore, O kings, be wise; be warned, O rulers of the earth” [Psalm 2:10]. It should be the first care of kings to advance God’s glory.’