I was fascinated to hear one of my fellow students say toward the end of the course that she was now sympathetic to the Southern view after reading McPherson's book.
Anything is possible.
McPherson has a history of showing hatred towards the Confederate Veterans and writing very poorly about them (see his letter to President Obama and his introduction to Jefferson Davis' book on the War). He is more interested in glorifying Lincoln's legacy and bringing modern racial thoughts into the Civil War era at the expense of accuracy in my opinion then bashing the Confederates.