The predetermination is that if it is in the Bible, it must be true. That is clearly your starting point.
No. Point out where you got that from, please.
I already told you; trying to have a discussion about the assertion in your OP. I don't think the evidence you presented in the OP supports your conclusion at all.
Then
show why the evidence I presented in the OP does not support the conclusion at all.
Why shouldn't it be? You're the one claiming t have evidence for a conclusion, so you need to present that evidence in a way others can understand.
I believe I did.
People here are not babies... Right?
I'm not asking for simplification of what you've already posted, I'm asking for more detail and complexity. The scripture you're relying on doesn't describe anything clearly or consistently enough to be taken alone, you need more than that to support any conclusion.
I used scripture only to define demons and describe their activity.
Also, I used a prophecy in the Bible as an explanation given for what everyone is seeing.
I explained why that explanation is supported by the evidence everyone is seeing. I provided the links.
If that's not clear and consistent, then I must not know what is clear and consistent to a person like yourself. I'm sure you are an adult though... Right?
The point is I still don't know what kind of demon concept you're talking about. Different proponents will take the same sources as you and yet come up with vastly different ideas or beliefs. I didn't want to guess as what you're thinking and put words in to your mouth. I'll give it a go if you insist though.
Maybe deal with the OP, rather than presume based on what you hear from others.
I can't help but think you are trying too hard to build strawman arguments.
"Demons are fallen angels, spiritual beings and so not detectable by material human means. At some point in human history (1914?), the war in heaven led to demons coming to Earth and since them some or all bad things that happen to us (at least from the viewpoint of the developed world) are caused by demons by some unknown mechanism.
I would correct this
"since them some or all bad things that happen to us (at least from the viewpoint of the developed world) are caused by demons"
Since then, there has been an obvious change, evident in practically every region of the world - it become increasingly chaotic over the last century with concerns about the level of increased crime, and other problems, resulting from man's activities.
...in a nutshell.
Why God allowed all of this is a mystery.
It's a mystery to many, but it only is to those who don't know.
You are one of the people who can somehow detect their influence, consistent with what is written in the Bible and that is your evidence thy exist. Anyone who questions or challenges your conclusion simply can't see this evidence because they're wilfully blind to the spiritual world due to denying God."
Is that your conclusion from the OP?
So, it's a matter of knowing what to look for. If you aren't a scientist with knowledge of what to look for, you would never consider any notion of Dark Matter.
Likewise, if you are not a Bible student, and don't know what to look for, you would never give thought to the presence or influence of demons.
That's fine.
If the Bible is true, billions of people will die in willful ignorance.
Would that fact change because people are willfully ignorant? No.
What do you want me to do... Join you? Why?
I have evidence the Bible is reliable. I have a basis on which to build on knowledge, and move forward in my research.
You don't have to follow me. You don't have to agree with me.
Challenge me, yes, but don't expect me to say I am on your side.
Is that what you are seeking? If not. Pleas continue.