The Stone Choir guys give a slightly different picture of Christian Nationalism. The version they describe is more "A society that tries to order itself according to the way God made us, because that's Christian. God clearly (scriptural precedent + basic observation) made us in such a way that Nationalism (based in race) works well, so this order naturally includes Nationalism." 

It seems that the term has largely been taken over by colorblind Christians who are trying to erase the "natio" root meaning. I wish there were a decent book/essay I could point to.