How did the war of 1812 affect public opinion in the united states? a. feelings of nationalism declined because the war destroyed farmlands across the country. b. american pride and confidence surged because the country proved its military ability. c. feelings of nationalism declined as americans realized the importance of trade with britain. d. american military leaders became unpopular for leading the country into a costly war. e. the federalists became popular for supporting peace with britain to keep trade going.