Because at any given time the soviets could set the missiles off and attack the US from all sides and we would have no way to stop it. It would also be attacking some of the most important places in the US
Because it was incredibly dangerous for there to be missiles in Cuba controlled by the Soviet Union, due to the fact that Cuba was perfectly placed near the U.S. This made it the perfect strategic spot to launch missiles to several major U.S cities, as well as Mexico City, completely destroying them, and killing countless peoples as well. Hope this helps :)
Shortly after arriving in Europe American troops were able to push to the south and east for the first time while Russian forces moved in from the East.
