Who said it is about "people" to start with? Satan has a name too, Lucifer.
We might learn that there is a wee bit of a problem being simplistically minded about these matters.
How so? Look at Paul in 2 Cor. 12:7. What do you see? I see one who is saved and one who is predestined and damned to the LoF.
2 Corinthians 12:
7 And lest I should be exalted above measure through the abundance of the revelations, there was given to me a thorn in the flesh, the messenger of Satan to buffet me, lest I should be exalted above measure.
Want to see the same picture again?
Mark 4:
15 And these are they by the way side, where the word is sown; but when they have heard, Satan cometh immediately, and taketh away the word that was sown in their hearts.
Hear again? Acts 26:18, 2 Cor. 4:4, 2 Tim. 2:20-21, Romans 9:18-24, 1 John 3:8
In scripture it always addresses TWO parties in ONE location as it pertains to man's construct 'in the flesh.' Man and Devil.
Scripture speaks in stereo. People unfortunately always tend to hear in monaural and never quite seem to be able to get the picture.