Let me put this way. Everytime America forgets that we wanted to distance ourselves from the errors of the old world, and start emulating and even envying them, we inject a foreign body to our fragile democracy.
American secularism is the most successful model there is (not perfect, of course). Europe basically replaced the church with the state, while even in its most extreme cases, America still tried to keep a good compromise.
I believe that deep down, what we have is that in one side we have people who want america to be like europe; see how many times posters here bring aspects of the relative new and untested Scandinavian system here.
On the others we have people who criticize the government but also See them as new messiahs when its convenient.
Maybe the USA haven’t been able to recover from the necessary centralization needed after it’s role in he cold war, and needs to review its roots and yes, invite new americans to be part of its history instead of falling in the traps of european criticism ( one typical example is on the almost word by word criticism between north and south americans that reflect the exact same arguments from when Spain and England used to be the rival empires).