The One God concept came out of Master-Slave religions - ancient people living under Kings, Dictators used them as a template for God - hence all the - Get down on our knees, beg, grovel, blindly obey(Kill my OWN son? Yes, Master), sing only his praises etc
Basically a Dictator like Putin will not allow competition - He is the King, the Ruler and one must obey only him
A slave may serve only One Master - hence the One God!
Remember, Heaven is not Earned, it is GIVEN - given to only the loyal, those who believe in only One Master
The goal is Pleasures of the flesh in Heaven - the Master will GIVE us that but we must serve him and him only
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The Many Gods are the Many Teachers that we have in life, starting with the first teacher, the female
The goal here is Enlightenment, Knowledge and for that we need not just one teacher, but many
And this is where Buddhists lost their way
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So in the end, the one or many Gods depends on what one seeks
If it is just pleasures of the flesh, and one is willing to just beg and be given, then One Master is enough
But if it is Enlightenment, Knowledge - then it is many Teachers or many Gods