Is there anything actually wrong with "Christian nationalism"?

As for the Christian part of “Christian nationalism,” part of being a nation is a shared religious heritage. And in America, that historical heritage is, of course, Christianity. This is where the distinction between the nation and the state comes into play. The state is a government that rests on and includes much of a nation. According to Hazony, “A nation can exist independently of the state, and does not have to include every individual within the state.” When our Founders formed the United States of America, they instituted a state to govern a nation and provided a Constitution that protects religious liberty and every individual’s right of conscience. But they were not intending to create a secular society divorced of all religion…

My own definition of “Christian nationalism” would be this: An orientation for engaging in the public square that recognizes America as a Christian nation, where are our rights and duties are understood to come from God and where our primary responsibilities as citizens are for building and preserving the strength, prosperity and health of our own country. It is a commitment to an institutional separation between church and state, but not the separation of Christianity from its influence on government and society. It is a belief that our participation in the political system can lead to beneficial outcomes for our own communities, as well as individuals of all faiths.

Critics like Samuel Perry and Andrew Whitehead know the reality that we are a historically Christian nation. The issue is they don’t want us advancing public policy based on a “specific vision for the country” because it conflicts with their own vision. They have their own agenda: progressive, secular globalism. That’s OK. It’s their right, under our system, to have that view and to participate themselves. But let’s not pretend—and I say this with great respect to pastors and writers like Tim Keller—that their agenda is about anything other than power.