God doesn't save us to perpetuate a particular Christian sub-culture. He saves us to advance a supernatural kingdom that is not of this world.

If you don't have the worldview of the people who produced the Bible - under inspiration no less, - you can't understand what they were trying to communicate in many respects. Biblical people weren't modern people. That's self-evident no matter how much we try to deny it.

Angels can fail because God allows them to make decisions and they are lesser beings than the perfect God. They can go astray, but the task is legitimate. God never tells they aren't allowed to instruct people - "just shut up and babysit them".

How much of what the biblical writers believed about the supernatural world do I believe? They weren't us. We are products of the Enlightenment; they were not. So let's stop denying that reality. Rather than sitting in judgment on them from our Enlightenment perches, we ought to have them sit in judgment on us when it comes to informing us about the supernatural world. After all, what they wrote was ultimately overseen by God.

Rebellion against God results in being cast out of his service. God doesn't run the affairs of the spiritual world or our world with rebels on his payroll. They are cast to the Underworld (in the case of the Eden rebel), or a special place in the Underworld (e.g., the offenders of Genesis 6:1-4, who are, to quote Peter and Jude, "kept in chains of gloomy darkness" or "sent to Tartarus"). There are more divine rebels than that in the Bible, but hopefully that scratches the surface enough.

Scholarship aimed at truly understanding what the biblical writers meant often does not filter down into the church and through the pulpit to folks who show up on Sunday. I think that's just wrong, but scholars rarely make any effort to decipher their own scholarly work for people outside the ivory tower.

The powers of darkness are still part of the spiritual world - they don't become something else when they rebel against God. Disembodied believers are, by definition, also part of the spiritual world. So are God and Christ.