In first century some were healed whether they wanted to be or not. Today God does not coerce beyond one's will, nor does Satan. There is a fair, just battle for and in the human heart. This battle is within us. In our text, the demons desire to inhabit pigs.
People are amazed, but fearful.
Believe what has happened, afraid. Not all who couple fear and faith accept. Freedom from evil, freedom from control, freedom from disease, freedom from self. May dislike because identification with Pharisees, but text does not say so. Jesus is Jew, observing Jew, here is synagogue ruler, not as in Acts, but in Mark.