You'll notice both a ? and a ! in the title. I don't know if I should say that as a question or as a statement.
Let's look at this scripture:
Luke 8:35 Then they went out to see what had happened, and came to Jesus, and found the man from whom the demons had departed, sitting at the feet of Jesus, clothed and in his right mind. And they were afraid. 36 They also who had seen it told them by what means he who had been demon-possessed was healed. 37 Then the whole multitude of the surrounding region of the Gadarenes[e] asked Him to depart from them, for they were seized with great fear. And He got into the boat and returned.
38 Now the man from whom the demons had departed begged Him that he might be with Him. But Jesus sent him away, saying, 39 “Return to your own house, and tell what great things God has done for you.” And he went his way and proclaimed throughout the whole city what great things Jesus had done for him.
When a Christian has a relationship with God, through Jesus Christ, as led by the Holy Spirit... when such manifestations happen today, such as a demon being "cast out" of a person, MANY Christians today FEAR this.
SO my question in basically... if a person DOES have a relationship with God, through Jesus Christ, as led by the Holy Spirit... then WHEN the power of God is manifest today, WHY do people and this INCLUDES Christians... FEAR when God glorifies Himself in a miraculous manner? Such as WHEN another Christian uses their authority "in" Christ to cast a demon out of another person.
God wants a very intimate PERSONAL relationship with Christians (with us, with "you"), so that means when He manifests in "power"... shouldn't this produce Praise/Honor/Glory proclaimed? Yet, in some... they fear... why?