I would agree with you if I were able to find any members of the Democratic Party calling the media "enemies of the people". As I am unable to, I must unfortunately conclude it is, in fact, a political issue -- or at the very least an issue stemming entirely from one side of the political aisle.
Additionally, you may be suffering under some misunderstandings with regard to the Stanford Prison Experiment -- long story short, the methodology is largely understood to be flawed at best (Source: https://psycnet.apa.org/record/2019-45337-001) -- and therefore the conclusions as well. That may have contributed to misapprehending the fuller picture (nationalism) for the narrower one (tribalism).
I remain open to any new evidence that authority figures within the Democratic Party are also describing the media as "enemies of the people" -- but until that arrives, I think we can agree that in this case tribalism has been subsumed into nationalism -- since tribalism is just the low-level building blocks of nationalism anyway.
Additionally, you may be suffering under some misunderstandings with regard to the Stanford Prison Experiment -- long story short, the methodology is largely understood to be flawed at best (Source: https://psycnet.apa.org/record/2019-45337-001) -- and therefore the conclusions as well. That may have contributed to misapprehending the fuller picture (nationalism) for the narrower one (tribalism).
I remain open to any new evidence that authority figures within the Democratic Party are also describing the media as "enemies of the people" -- but until that arrives, I think we can agree that in this case tribalism has been subsumed into nationalism -- since tribalism is just the low-level building blocks of nationalism anyway.