Was dropping the bombs justified?

First, the bombs weren't acceptable by no means because some other action could've been taken to avoid the conflict, but the japanese did deserve it because they started it with the U.S. at Pearl Harbor. Secondly, however, some critics accused the United States of racist motives because the bombs were dropped only on nonwhite people. Since Japanese were already on the verge of collapse by 1945, the second bomb on Nagasaki was unnecessary to bring the war to a conclusion. The atomic attacks on Hiroshima and Nagasaki weren't the last shots of WWII, but the first salvos in the Cold War. Although, President Truman did infact ignore Tokyo's attempts to negotiate a surrender in the summer of 1945 and rejected all alternatives to dropping the bomb because he wanted to intimidate and isolate the Soviet Union. The bomb wasn't just another weapon, but the major instrument of destruction that would deliver victory. Thirdly, the Japanese clung to many unacceptable conditions like: protection for their imperial system of government, the right to disarm and repatriate their own troops, no military occupation of the home islands, no international trials of alleged war criminals, and possible retention of some of their conquered territories.