Over-wrought and full of attribution error.
MacArthur was out of theatre long before the armistice. I believe Gen Ridgeway was the commander for the latter half of the war.
Truman fired MacArthur as the General was trying to make strategic policy independent of the elected government and was publicly commenting on it. 
FYI, Truman was very clear in his memoirs that he knew he had to dismiss the General, regardless of the political cost, following their conference on Wake Island in 1950. On top of everything else, MacArthur apparently failed to salute him, clearly disrespecting the Commander in Chief.