Surprisingly, belief in God's manifestation in "entity of matter" is the single gold standard that separates the Holy Spirit from other evil lying spirits:For someone who believes the English translations are the scriptures, you could come to that conclusion. To believe that God cannot be an entity of matter is not a lie. A lie would be to say God is a man so as to repent like a man. God is not a man so as to repent or regret like a man.
Beloved, do not believe every spirit, but test the spirits, whether they are of God; because many false prophets have gone out into the world. By this you know the Spirit of God: Every spirit that confesses that Jesus Christ has come in the flesh is of God, and every spirit that does not confess that Jesus Christ has come in the flesh is not of God. And this is the spirit of the Antichrist, which you have heard was coming, and is now already in the world. (1 Jn. 4:1-4)
If God cannot incarnate into a man, then we're condemned for our sins forever, there's no salvation and remission, because sins must be atoned for by the sacrifice of a sinless offering, there's no other way. A spirit can't die for our sin. You're preaching the heresy of docetism.