The cold war was foretold by Churchill following the 2nd World War. He tried to tell the world of the Soviet threat. "Red" is slang for a communist. Although it is not illegal to be a communist in The United States, the "Red Scare" was very prevalent in the 1950's due to Senator McCarthy.
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I’m pretty sure that is independent
During the two centuries following the discovery of the New World, over 90% of the native population were killed by disease and warfare.
The USA was concerned because they feared that they would launch them, this happened in a point in time where relationships between the two countries were not good and they didn't trust each other. Then when Russia had missiles in Cuba, which is close to the US, it caused the US to freak out about it, it's now called the Cuban missile crisis.
Advancements in transportation and communication make it easier to spread culture.
