Surveys and polls are a joke. The questions can be manipulated in such a way as to get the answer you seek.
1) Despite all the evil that the Nazis perpetrated, do you feel that some of their policies such as the construction of the highway system, the elimination of unemployment, the low criminality rate (and) the encouragement of the family were beneficial?
Most likely answer, yes.
2) Do you think that some of the policies of the Nazis such as the construction of the highway system, the elimination of unemployment, the low criminality rate (and) the encouragement of the family outweigh the negative aspects of Nazism, the Holocaust and World War II?
Most likely answer, no.
This is not meant to justify the poll results, only to show that results can be easily manipulated by the pollsters.