Nino is one of those people that watches "The Passion Of The Christ" and thinks he read the Bible.
Satan is the voice of temptation in Genesis, And that is a story that predates Judaism and the concept of Satan anyway, nor is the serpent-Satan connection established in ancient Hebrew versions.
Then he has a friendly conversation with God and convinces God to slaughter Job's family to test his faith, then Satan is the voice of temptation for Christ in the wilderness. No physical power there, nor does Satan even have a physical body.
John talks a lot about Satan in his various letters as the personification of temptation, but not an actual entity.
Mel Gibson uses Johns themes in "The Passion Of The Christ" where Satan controls Judas. But remember the crucifixion of Christ was God's will, not a Satanic plot. There is no theological basis to suggest that Satan is powerful enough to kill God's son on a whim, unless maybe you're an actual Satan worshiper.
Then there is this whole "Left Behind"/Book Of Revelation scenario which I'll believe when I see it.
Otherwise, the mention of "demons" seems to be describing schizophrenia or maybe bath salts.
According the Bible, Satan gets almost no screen time and his power is mainly limited to whispering in people's ear. And Satan never manifests anything resembling a human body.