The reservations about the Marshall Plan ended when there was an overthrow of the Czechoslovakian government. This resulted in the establishment of a pro-Soviet government being set up. This fear that the federal government had about communism spreading now felt justified and allowed for significant support of the Marshall Plan. This gave financial assistance to countries all over Europe including Great Britain and France.
because they were used to their everyday life and didn't like introductions of new cultures and myths because they feared chances of rebellion and wars
the lack of new factory jobs in the North" was not an economic problem facing the United States at the end of the Civil War. The others were all quite serious problems.