Something or nothing?

1 Corinthians 8:4 - Therefore, as to the eating of food offered to idols, we know that “an idol has no real existence,” and that “there is no God but one.

So idols, false religions are nothing. They are delusions

But,

! Cor 10:19-20. What do I imply then? That food offered to idols is anything, or that ^fan idol is anything? ²⁰ No, I imply that what pagans sacrifice ^gthey offer to demons and not to God.

So behind the idol, the false religion is not nothing but there is the demonic. 

So, on the one hand a Christian does not need to fear anything from a false religion. It is nothing. On the other hand, behind it is the demonic. So may i say Islam is nothing, it is a false religion. But it is the masterpiece of the devil for it mixes so much truth with error. Satan disguised as an angel of light impersonates truth.

But though it be nothing it is demonic in another sense too. Occult practises abound. In Africa, a person wanting charms to protect themselves or harm an enemy is just as likely to find a supplier from among Muslims s from animistic followers of African traditional religion. I have even heard it reported that those dealing in such charms have told purchasers to beware. They may not harm true Christians but if used on a Christian could have dire rebound consequences on the purchaser. So the purveyor of the occult may realise the true power of Christ. 

Acts 13:8-10 But Elymas the ^zmagician (for that is the meaning of his name) ^copposed them, seeking to turn ^dthe proconsul away from the faith. ⁹ But Saul, who was also called Paul, ^efilled with the Holy Spirit, looked intently at him ¹⁰ and said, “You ^fson of the devil, you enemy of all righteousness, full of all deceit and ^gvillainy, will you not stop ^hmaking crooked ⁱthe straight paths of the Lord? 

 This shows that magic, manipulation of occult forces, is from Satan. I so not mean the magic of the late Paul Daniels, mere sleight of hand  I mean using religion as a charm as the Israelites did taking the Ark of the Covenant into battle as a charm instead of seeking God's will and his help.

Charms are at best rubbish. At worst occult. Similarly fortune telling, tarot, ouija boards and all the rest of the rubbish that is superstition or false religion. It is at best rubbish, nothing. At worst it is occult evil. Can it be both?