You’re right. It’s a myth that America was founded as a Christian nation, in the sense we think of Christian faith today. But it *was* founded on principles utterly dependent on a Judeo-Christian worldview. One reason we are in such a mess is that we have lost our consensus about that worldview.
Yes, we should quit pretending America needs to be restored as a Christian nation. By the same token, instead of wasting your breath trying to dispel the myth, help us all by admitting a civilized society cannot be built on a secular foundation.
Give your people the tools they need to get out in their ruined communities and rebuild the walls. As we teach our neighbors the value of walking in God’s ways, they will realize the only hope for abundant life lies in the healing, transforming power of the God who sets captives free.