God - an illusion?

Is it possible that since the beginning people have worshipped and adored deities that never existed and were based only on wishful thinking, because there simply must be higher powers for all inexplicable phenomena and so that life makes sense?

The author explains plausibly on the basis of the texts of the so-called «holy writings» like Bible and Koran why deities spring from the wishful thinking of the people and not as described in these books, the human being was created after the image of God. Because an «all-wise» God would certainly not have created such a defective being as man, who ruthlessly exploits and destroys nature, on whose existence he depends, and also leads barbaric wars even in the name of God.