Hitler represents whomever in your past took advantage of you. Sounds like suppressed of the past showing in your dream that you had to give in for them to let you go. You got away from them which showed they weren't that strong as you thought and you got away. This shows me recovery from your past and good therapy. Your feeling sad could mean that someone who violated you you felt sad cause they meant something to you but you had to get away from them. It sounds like forgiveness of the person who hurt you but letting them go and have sorrow for them in their fallen state. I don't know if any of this makes sense. tc and good luck.