The FDR quote from a century ago does nothing to explain that fear can create massive physical problems in a person who cannot regulate their emotions. The State seeks to always keep its citizens under pressure from external enemies to remain relevant and necessary.
The corporate media’s job is to divide and manipulate the public through fear, so it should not be surprising that social media was designed to serve a similar purpose. The threat of “terrorists” was the focus for the first two decades of the 21st century, until a new invisible enemy emerged in March of 2020. The newest boogieman is the looming threat of World War 3 that could kick off in Ukraine, the Middle East, or even the South China Sea. Resist the urge to give in to the fear.