Why did churchill believe the spread of communism was a threat to europe?

sorry this is all i know ...

On March 5, 1946, Winston Churchill delivered his famous “Iron Curtain” speech, officially titled “Sinews of Peace,” at Westminster College in Fulton, Mo. After being introduced by President Harry Truman, Churchill, the former prime minister of Britain and now the opposition leader, warned of the threat posed by the Soviet Union, a World War II ally of Britain and the United States.

                                       HOPE IT HELPS

the first new deal programs had not generated an economic recovery

then its a law the end