The difference lies in interpreting the two sides of the conflict. McPherson saw the war as the war between the evil South and the good North. He was focused on the abolition of slavery and their integration into the society as free people. Horwitz on the other hand saw South not as evil but as a faction which went to war to protect its economic interests.
The key characteristic that marked American mainstream society during this time was "stability". America had just emerged from World War II with a great deal of economic prosperity which allowed many people to buy houses and live peacefully in suburbs.
The Nazis established six extermination camps on Polish soil. These were Chelmno<span> (</span>December 1941-January 1945), Belzec (March-December 1942), Sobibor (May-July 1942<span> and </span>October 1942-October 1943), Treblinka (July 1942-August 1943), Majdanek (September 1941-July 1944) and Auschwitz-Birkenau (March 1942-January 1945<span>) ...</span>
I agree since he is right , nobody can put a limit on your mind , you can do anything