I am curious to know what people think magic actually is. I believe it to be nothing more than a projection of intent and sometimes similar to that of prayer. It has nothing to do with satan or demons or evil or anything like that.
I'm not sure anyone really knows for certain.
HC Agrippa at least did a good enough job of explaining natural magick and divining. Natural magick is about imbuing charicteristics/virtues of one thing on another thing. It comes from platonist/neoplatonist thinking that would tell one that God sends down an idea, that idea gets clothed by the celestial spheres to be sent down to the earth from whence it comes back up clothed in matter (which is described in elemental terms of earth, air, water, and fire). The idea is that many things have Saturnine, Martian, Venusian, Jovian, Lunar, Solar, or Mercurial characteristics or virtues and the ritual of imbuing an object with their characteristics could be thought of as something like macrochemistry. Divining or any -mancy (pyromancy, hydromancy, airomancy, geomancy) is looking at things that produce moving random patterns for the black mirror effect - ie. getting a feedback loop into your own brain, into your subconscious, and pretty much getting the benefit of the pharmakeia effect without the pharmakeia (ie. bringing hypnogogia to the surface).
All of that is relatively victimless (self possibly excluded) unless one is sacrificing animals or pulling eyes/tongues from live things for those planetary characteristic.
As far as Enochian angel magick, greater and lesser Solomon keys, and grimoire work for summoning daemons and elementals - I don't know a thing about it, I don't even think I want to go there for intellectual curiosity the way I did in researching the stuff above, but there is a whole flank of magick that's dedicated to it. My honest guess - magick being real and there being a whole subcategory of magick dedicated to it with a great wealth of academic research from people in those fields, I tend to take them at their word that they can summon.
As for whether its demonic in the Christian sense, I think you're looking then at whether or not the bible is edified by the realities of the world we live in in the terms that its read. Its an indirect proof but aside from its prophetic value there seems to be something moving in the heirarchies (human and otherwise) that tries to steer the world toward fulfillment of its prophecies. That in and of itself is major cause for concern. Is it possible that evil is simply opposite poles of nature (ie. Luciferic/Ahrimanic with Christic in the middle)? I can't rule it out, and I cant rule out that such a system wouldn't have its own incredibly tough love for people messing with things that they shouldn't.
Regardless, when people bring up the name of Jesus it stops 'aliens', it stops ascended master channelings, it can cast out demons - whatever the truth is on whether or not we're anywhere near understanding the bible in its full depth it does seem clear that whoever Jesus is, whoever said every knee shall bend - I don't think they stuttered. IMHO that's good cause, especially with more internal logic supporting him being Yahweh's son rather than Yahweh being any kind of demiurge, Leviticus 20 and Deuteronomy 18 are worth paying attention to because those laws are a part of who he is, what he's about, and what he'd demand of us if we're with him.