My personal experience leads me to believe that there are adversarial disembodied spirits that can effect the physical world. I believe that there is scripture to support this. Swine do not commit mass suicide in and of themselves. That is how I interpret that story. Judeos will cite Ephesians 6:12 and say that we are not to fight against flesh and blood. I believe what that verse actually means is that when we fight against flesh and blood [the jews and their non-white shock troops] do not forget that there is a spiritual component to the battle and thus put on the whole armor of Yahweh.
I posted the following here some time ago;
From studying CI I have become convinced that there are embodied demonic spirits which are the result of violations of kind after kind. They are not human, Adamic men and thus cannot be brought into the covenant with us.
Nonetheless I am still of the belief that disembodied demonic spirits exist and can effect the physical world. I don't see any other way to interpret the scriptures about the suicidal swine. From time to time we read about strange behavior in the animal world. Homosexuals love to point out bizarre deviations from the norm when they occur between animals. This is probably no different than the suicidal swine. I had an experience in the Czech Republic where a White student of mine was mesmerized by an asiatic karate instructor with supernatural powers. He described all these strange powers that this guy had like being able to knock people over without touching them or the the ability to, without touching render them incapable of movement once knocked over. My student's claim was that he was no different than our Jesus. So I went along for one of these demonstrations.
My wife and I prayed for several days before that any help that this asiatic gets from disembodied spirits would be cut off at least for the duration of the event at hand. We arrived at the venue continually praying into the beginning of the evening's demos. This asiatic was sitting on the side of the stage and about 30 minutes into the demos the woman sitting next to him just leaped from her seat, started screaming hysterically and ran out of the auditorium. I interpreted this as perhaps a spirit in him entering the woman and being driven from the arena. I was watching this asiatic carefully. He was clearly disturbed about something. When he finally got up to perform his magic he was incapable of doing anything unusual. It was a farce actually. At the end he made some comments about what he does saying that it isn't demonic in nature. I asked my student if he had ever heard this guy make such comments before and he told me no, he had not. I then witnessed to my student about our prayers and how Christ had prevailed over his fraudulent miracle worker. It was a pretty wild evening.
Is the asiatic an embodied demonic spirit? Yes. Can he employ disembodied demons to deceive people? Perhaps. Either way this shouldn't be a point of division.