My take is this.
Here is a paragraph from a textbook "The evolution of man" by Gabriel Lasker, 1961.
Playfulness, another capacity important in the development of human culture, may also be foreshadowed in some primates ( Kroeber 1948). It is doubtful that art, science and philosophy could have developed solely as planned activities with predetermined ends. Random activities engaged in for their own sake are certainly pleasurable to the young of many other mammals as well as to humans. In man and to a lessor extent in the chimpanzee, the delay of sexual maturity and the long period of childhood dependence provide opportunities for play. Man's capacity for "make believe" is, in fact, a likely stimulus to invention."
Now I can explain why Islam is so non-human. The regimentation of Islam removes or overrides play. Almost everything is forbidden in Islam. The consequence is no art, no science, no philosophy, no humanity, no good will, nothing.
All prayer and no play makes Mohammad a killer.