It is confusing, isn't it? Hard to square feelings about people who have frightened you, and trying to see them clearly. I say that setting aside the term "evil" is useful if you want to better understand the processes that made them that way. And I am willing to set aside the term "good" too -- unless you define that better. Why is something "good"? What does something "good" do for you? If it makes your life truly better, makes the life of living things (or even the whole universe) truly better, then you might define that as "good".