The Trump administration lets Germany know that it has a vassal status and must ultimately serve the [American] empire.
German policy responds accordingly with spineless subservience. Anyone who believes in Germany’s unrestricted sovereignty will be disabused by the tweets of Foreign Minister Heiko Maas. From them speaks the spirit of submissiveness and obedience.
Recurring pro-Kremlin disinformation narrative about German-American relations. Pro-Kremlin outlets often use the disinforming narrative about different countries being under the American thumb - see other examples here.
Germany is an independent and sovereign country and is not dependent on the United States of America in terms of foreign policy making and therefore it is a conspiracy theory presented without any evidence. Germany and the US have close partner relations of two sovereign and independent countries.
For other disinformation cases see: Germany is a vassal of the US; Germany is the executor of US hegemony over Europe; The USA is controlling Europe through occupied Germany; Germany will have to choose between defending Europe's interest and catering to Washington.