[Tamrajh]

I've recently begun reading the New Testament for the first time and although I'm finding it quite interesting, I'm also confused by something. There are numerous references to Christ casting out evil spirits from people and even one where the evil spirits took over a herd or gathering of swine (pigs) who then went and drowned themselves.
I have numerous questions about this.
I thought we were protected from this type of thing happening because of the enmity between Satan and us so the only way this could happen was if we invited Satan into our bodies. Have I missed something here?
If it happened so often back then, can't it still be happening now? We dismiss the thought of possessions now and think people are just "crazy" but what if it really is a possession just the same as it was when Jesus walked the earth. Shouldn't there be something done the same as Christ did when he was here to help these people in a religious sense?
Thanks in advance for clearing this up for me. Even though I'm finding the New Testament very interesting, I'm really getting hung up on this possession part because it's very different from how we view things now.