Are you under the assumption that there is no other God but the one that we know and love – Yahweh? Please explain the Ten Commandants when God said you will have no other Gods before me. I would interpret that verse describing several Gods. The plural literally means there are multiple Gods. We must just ensure we worship the only true God as it is He who reigns supreme over all of these false gods and desires for us to worship Him accordingly.
Worshipping other Gods is taboo. God forbids it and declares it evil. Having studied the Bible for over fifty years I am convinced that no other sin is more grievous to God. Yet even to this day isolated pockets of idol worship exists. Molech is a favorite and requires child sacrifice. Are these people who worship idols crazy? No, I believe they are just evil.
In my youth, (19 years old), I practiced witchcraft. It worked time and again meaning I would cast a spell and get the result I was looking for. I shudder to think what would have happened to me had I continued. I summoned a demon from hell and that was enough for me.
We are warned not to engage with these powers. Eph. 6. [12] For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places.
I have been told by well respected people not to ever leave the door to sin open, even if partially cracked. It is dangerous beyond measure. Why? Because you are betting your eternal soul when you do so. Better to put on the full armor of God and protect yourself on all fronts.
Eph. 6:12
These rulers of darkness are spiritual hosts of wickedness in the heavenly places – that is they are spiritual beings with great powers and great wickedness! They are the Devil and the demons. Here is the enemy. The one who has in his pride plotted against God from before the beginning.