I'm pretty sure devil worshipers use the penta-gram.
Yes one with a single point downward. This comes from a view of a horned goat head representing Lucifer/Satan. Oddly this comes from the image of Baphomet which itself was inspired by a Jewish and Pagan tradition of slaughtering a goat told sins of a town by the Rabbi / Priest.
This is where we get the term scapegoat from as well. We're granted an eSCAPE from our sins by this goat. This goat was slain to banish sins. Its carcass was thrown into a garbage pit that was lit and burned called sheol which later translated over to the concept of Hell for Christianity. The use of fire as cleanser both physically and spiritually is an ancient one. It goes back to a maxim,
igne natura renovatur integra -- through fire, nature is reborn whole.
Consequently I.N.R.I is often seen on Christian crucifixes, this is meant the same way as a reminder that the Christ is the redeeming Lamb. It was his blood that washed away the sins of Christians.It was him that went into Hell to save sinners and returned. Contrary to some belief that I.N.R.I meaning King of Kings or King of Jews.
A pentagram with a single point upward represents the positive, life and not evil. Not exactly that a downward pointed pentagram equates to evil either. Yes, it opposes the positive. And in that much yes, one could say that defines it as evil.
Symbols though like guns are merely tools, words are tools as well. There's more stock in the intention behind the symbol, word, tool than the tool itself. After all have you seen a gun physically walk itself it over, pull its own trigger after loading itself, and killing a person? I doubt it. People kill people. If they didn't use a gun they might use bare hands, it's the intention, not the tool.
You need light and dark to make a full complete day though. Without imperfection we don't know perfection and perfection could not exist without imperfection. Then, I'm one of balance in life, what do I know?
Well, I know as Socrates I can admit there's much I do not know. I also took the advice of Delphi, got to know myself. To whit then I know I'm keen on history, religion, sociology in general. I love connecting dots.
Will digress though as I rarely see cause to use such knowledge. Even then, despise flaunting it.
And I've always heard it called the Star of David as well. I also though know of some of its Hermetic symbolism as well as Kaccalistic symbolism. Used to thumb through an encyclopedic tome by Isreal Regardie about The Golden Dawn.
The Hermetic cite the hexagram as a Jewish symbol representing the final dawn when the Jewish people ascend to rule the Earth. And no the Hermetic do not slander nor defame, or ascribe to hate speech in such a claim. Other groups may but not the Hermetic, they only observe and report.
You can see both the pentagram and hexagram over the Tree of Life, a Jewish Cabalistic teaching.
And yes, aware I spelled Kabal two different ways. It can be spelled either way depending upon again intent. I would not though spell Enochian any differently as Enochian is alleged the language of angels in the Cabalistic tradition. It gave rise to Hebrew the language of the Jewish people, though that could have as easily been Amharic.
The circles in the image above represent the twelve Sepiroth. These can correlate to the twelve disciples, the twelve astrological houses, the twelve months. Sol or the Sun is always regarded as God or the Christ depending on your view. It is the thirteenth house, Kether, or Glory.
This particular image omits Malkuth, which is below Earth in the image. There's likely seen a rationale to omit that. Malkuth represents Hell. Of course, I may be in error as well. Been quite a while since I was headlong into Hermetic stuff, I'm human, memory comes and goes.