The people of Nazareth, at this point, are positive about Jesus. They do not ask these questions because they think he is a bad man possessed by Satan (as the teachers of the law said in Mark 3:22). They asks these questions because they are surprised by his insight and abilities. The questions as to the origin of Jesus wisdom and miracles is thus considered positively, as if it came from God.1
2 And on the Sabbath he began to teach in the synagogue, and many who heard him were astonished, saying, “Where did this man get these things? What is the wisdom given to him? How are such mighty works done by his hands?