Why did the U. S. fear Cuba's massive economic aid from the Soviets?

Cuba's alliance with the Soviet Union was the main reason the United States viewed Castro as a security threat–a fear that was arguably vindicated during the Cuban Missile Crisis of 1962.

from my own personal expirence food stamps has alot this makes it eaiser so we can affod bills and so we can life a better lifestyle not needing to worry about paying actual money to buy food since most people spend 100-300 dollars a month on food so this alot so we can afford other bills and other stuff we need

whats the video? can u send a link?