Answer:
Stalin failed to keep some of his promises. Churchill and other allied leaders were afraid Stalin /Russians would not leave cities they liberated from the Nazis. Truman took over from Roosevelt and was tougher with Stalin. The West did not share information on nuclear/atomic developments, another sign of distrust. They felt he was another dictator, when they just fought dictators. The Communist ideology saw Capitalism as an enemy to be conquered rather than a different ideology to co-exist with.
Step-by-step explanation: