The thing for Christians to be concerned with IMO is not Christian Nationalism. Its the idolatry of politics and the state. What I do see is far to much faith being put in politics instead of Jesus.

I also see a lot of politics being falsely stated as Christian teaching. This can be on right and the left. People can disagree about methods and ways of accomplishing goals and still be brothers in Christ. But politics is so supreme in the eyes of many in the church that it becomes a point of division. Its actually absurd to me. I listen to people talk past each other and claim the other isn't a Christian. No, they aren't a democrat or republican. That's your beef with them.