While I cannot fully agree with all his conclusions, Kruger is certainly on the right track and once again displays considerable wisdom in how he addresses the issue. He gets the answer right even if he's unwilling to put it as strongly as I would. In the final analysis, America is not a Christian nation.
The Reformed spectrum is fairly broad and yet undoubtedly Kruger is part of a minority. This branch (if we want to call it that) of Reformed thought is uniquely American and definitely represents a more contemporary way of thinking. While that is often a cause for concern, in this case it's not. Though new in their circles, the shift in thinking with regard to Constantine and Sacralism definitely represent a move closer to New Testament teaching.
I say all this not sure where he's at in terms of Abraham Kuyper and the doctrine of Sphere Sovereignty. Many such criticisms of 'Christian America' are quickly canceled out by an adherence to that particular Dutch error.
Nevertheless I find myself appreciative of much that Kruger has to say. He's doing so good work in other areas as well. This piece was a refreshing read.