The confusing of or rather collapse between levels of politics is another sign of the decline. Rulers which themselves lack these skills and at the same time try to maneuver without experienced people having them, make serious misjudgements. Politics in the media is one thing, diplomacy is another. What governments say in public and what they in fact do are different things.
The US economic threats against countries voting for the UN resolution criticizing the recognition of Jerusalem as capital of Israel is an example of the lack of distinguishing between such levels. It feels like banalities to say this: Obviously Middle Eastern governments must publicly condemn the US decision on Jerusalem and support the UN resolution without this meaning bigger changes in de facto politics.
If a US president and his people can not tell the difference between media statements, diplomacy and real politics, then the daily tweets get even more threatening.
The American threats are also signs of the new arrogant rude way of seeing even allied countries. They are treated as subordinate.