Whenever these foreign leaders are no longer following every whim of the US or become friendly to countries the US doesn't like...
Did US just create next-ISIS? What is stopping US from bombing other independent countries?
US began to threaten Iran (again) after Iran fulfilled its obligations as confirmed by the five permanent members of the United Nations Security Council plus Germany, and even the IAEA Chief himself confirmed.
US poses the GREATEST THREAT to WORLD PEACE, beating out all challengers, according to global surveys in 2013 (WIN/Gallup) until 2017 (Pew Research).