what is the relationship between Gnostisim and theistic satanism ?

I do not know about that tradition, but you can study this as a basis for comparison:

Good article i read it before but satanism says that Satan is the creator of humans and there are 5 gods and the God known in the Judaism, Christianity and Islam is an evil being and to be sure of these claims you have to meditate and vocalize mantras , and some people tried it too and it succeeded with them, so what is that deceiving ? even black magicians who worshiped Satan in the dark ages and have been executed or tortured by the church didn't think like that , what is the gnostic point of view to these wizards and witches and theistic satanism ? is that like Zionism and masonry etc ?

"And there appeared another wonder in heaven; and behold a great red dragon, having seven heads and ten horns, and seven crowns upon his heads."

This tenebrous dragon turns along with the wheel of the centuries. This dragon from darkness ascended from the abyss, and with the turn of the wheel this dragon will fall into the abyss.

This dragon from the abyss is the evil of the world, the Black Lodge, the secret enemy with his terrible evilness.

We will expiate our error with the number seven. The ten horns of the dragon are the symbol of the wheel of destiny. This wheel will turn and this beast will sink into the abyss.

The times of the end have arrived, and nobody knows with exactitude how many years these times of the end will endure.

This dragon of darkness is the prince of this world. This dragon of darkness is the psychological “I”, the myself, the ego which all of us carry inside. In short, it is Satan.

"The white magician worships the inner Christ. The black magician worships Satan. This is the “I,” the me, myself, the reincarnating ego. In fact, the “I” is the specter of the threshold itself. It continually reincarnates to satisfy desires. The “I” is memory. In the “I” are all of the memories of our ancient personalities. The “I” is Ahriman, Lucifer, Satan.

Our real Being is the inner Christ. Our real Being is of a universal Nature. Our real Being is not a superior or inferior “I.” Our real Being is impersonal, universal, divine. He transcends every concept of “I,” me, myself, ego, etc. The black magician strengthens his Satan and upon this he bases his fatal power. Satan’s form and size result from the degree of human evil. When we enter the path of the perfect marriage, Satan loses his volume and ugliness. We need to dissolve Satan. This is only possible with the perfect marriage."

Yeah you are right but satanists say that they encourage the goodness and condemn all kinds of evilness , so what is the difference if they are not criminals but like priests ? the only difference they make Lucifer a real entity and you have the choose to worship him or make friendship but he is the creator of humanoids.

Next to every temple of light, there is a temple of darkness. Where the light shines brighter, there the darkness by contrast turns denser.
The Knights of the White Grail should inevitably fight against the Knights of the Black Grail.

The witchcraft salon located in Salamanca, Spain, is the fatal antithesis of the Temple of Monserrat.

Let us study this curious analogy of opposites. The Temple of the White Grail is a splendid monastery of the great light. The Temple of Salamanca is a splendid monastery of darkness.

The monastery of Monserrat has two floors. The witchcraft salon also has two floors. The Temple of Monserrat is surrounded by beautiful and sweet gardens. The witchcraft salon also is surrounded by romantic gardens where each flower exhales a breath of death.

Both are splendid edifices. In both buildings, truth and justice are well spoken of. In both temples, order and culture reign. In both temples, sanctity and love are spoken of. This will astound the reader, and he might question himself, “How is it possible that in the temples of evil, sanctity and love are well spoken of?” Please, dear reader, don’t be disconcerted. Remember, dear brother or sister, that the Knights of the Black Grail are wolves dressed in sheep’s clothing. The adepts of the left hand love to ejaculate the Christonic semen; that is why they are black magicians. Their philosophy is the philosophy of fatality. For them, all good is evil. For them, all evil is good. The doctrine of Javhe is divine for them. The doctrine of Christ is diabolical for them; the lords of darkness hate the Christ. The sons of the Abyss hate the Divine Mother. In their regions, they violently attack all those who invoke the Divine Mother or her beloved son.

The disciple, who wants to enter the straight, narrow, and difficult path that leads us to the Light, has to withdraw from all spiritualist schools. Those schools are filled with “sublime crimes.” Those schools are golden cages filled with “very beautiful poisonous vipers.” Mystic evilness is very abundant in those schools.

Under the shelter of the divine phrase “Universal Fraternity” the worst crimes registered in the penal code are committed.

It is distressful for us to state this, but complacency with crime is also a crime. It is as bad to be silent when one must talk as to talk when one must be silent. We would like to be silent, yet, one not only pays karma for the evil things that were done, but also for the good things that were left undone when these things could have been done. Therefore, we cannot be silent about this. We love humanity very much, thus, we need to point out crime, to touch the wound with the finger in order not to fall into the crime of being complacent with crime. If we would not say these things we would put a horrible karma (the karma of accomplices and cowards) on ourselves. So, the truth, although harsh, is our best friend.
All spiritualist schools, orders, and lodges are delectable gardens within which are nests of dangerous vipers and poisonous flowers filled with perfume. Ineffable enchantments that lead us to the abyss as well as sublime theories that can lead us to the precipice, and sweet smiles that carry us to disgrace exist within those schools where the devotees are filled with hypocrisy and fanaticism. Indeed, the opium of theories is more dangerous than death.

Spiritualist devotees hug with one hand and with the other they stab the back with the sharp dagger of treason.

Spiritualist devotees always cover their worst evilness with smiles and very sweet words. We do not have the intention of criticizing any person in particular because that is wrong; this is why we speak in a general manner for the good of the Great Work of the Father.

Thanks very much , your first quotation was very healing to my worry. But if i wasn't heavy and your brother , can you tell me the reality of freemasonry ? as it has many speciousness especially with Zionism and USA and Israel government like the Illuminati and those secret societies . I ask this because i read that Dr Krumm Heller and Samael Weor were part of freemasonry so i thought maybe they didn't know their reality .

Regards