Most people want to shy away from anything that deals with demonic oppression or possession in the Scriptures. In our modern world, we don’t want to seem like we are weirdos so we try to ignore and to deny things like demons. There are those on the opposite end of the spectrum who want to blame everything on demons as well, from failed relationships to job loss.
At the end of the Sermon on the Mount Matthew talks about people being astonished because Jesus spoke as one who had authority (Matthew 7:28-29 And when Jesus finished these sayings the crowds were astonished at his teaching for he was teaching them as one who had authority). In the follow 2 chapters (Matthew 8-9) he goes on to give us 14 ways Jesus proved that authority by His actions. In Matthew 8-9, Matthew is trying to get us to see that authority because it is not only the authority of a King, but also the authority of our great God.