Comparative theology is a two-edged weapon, and has so proved itself. But the Christian advocates, unabashed by evidence, force comparison in the serenest way; Christian legends and dogmas, they say, do somewhat resemble the heathen, it is true; but see, while the one teaches us the existence, powers, and attributes of an all-wise, all-good Father-God, Brahmanism gives us a multitude of minor gods, and Buddhism none whatever; one is fetishism and polytheism, the other bald atheism. Jehovah is the one true God, and the Pope and Martin Luther are His prophets! This is one edge of the sword, and this the other: Despite missions, despite armies, despite enforced commercial intercourse, the "heathen" find nothing in the teachings of Jesus -- sublime though some are -- that Christna and Gautama had not taught them before. And so, to gain over any new converts, and keep the few already won by centuries of cunning, the Christians give the "heathen" dogmas more absurd than their own, and cheat them by adopting the habit of their native priests, and practicing the very "idolatry and fetishism" which they so disparage in the "heathens." Comparative theology works both ways.
When you come down to it, has there ever been a genuine polytheism? Even Homer supposes a sort of fundamental unity of the divine that permits the gods to identify themselves as gods, even when they dwell far from one another (Odyssey 5.79ff). What the [monotheistic] revelations bring is, rather, the end of a "cosmotheism" that makes no radical distinction between the divine and the physical.
The remote dwellers upon the Ganges distinctly made known that future life about which Moses is silent or obscure, and that unity and Omnipotence of the Creator which were unknown to the polytheism of the Greek and Roman multitude, and to the dualism of Mithraic legislators, while Vyasa perhaps surpassed Plato in keeping the people tremblingly alive to the punishment which awaited evil deeds.
General Joseph Davey Cunningham, (1812-1851) author of A history of the Sikhs, from the origin of the nation to the battles of the Sutlej.
Even the most humane and compassionate of the monotheisms and polytheisms are complicit in this quiet and irrational authoritarianism: they proclaim us, in Fulke Greville's unforgettable line, "Created sick — Commanded to be well." And there are totalitarian insinuations to back this up if its appeal should fail.
It must appear impossible, that theism could, from reasoning, have been the primary religion of human race, and have afterwards, by its corruption, given birth to polytheism and to all the various superstitions of the heathen world. Reason, when obvious, prevents these corruptions: When abstruse, it keeps the principles entirely from the knowledge of the vulgar, who are alone liable to corrupt any principle or opinion.
David Hume, The Natural History of Religion, sect. 1, p. 312 (1898).
The legitimate powers of government extend to such acts only as are injurious to others. But it does me no injury for my neighbor to say there are twenty gods or no God. It neither picks my pocket nor breaks my leg.
They question you concerning fighting in the sacred month. Say: 'fighting therein is a grave (matter); but to prevent access to Allah, to deny Him, to prevent access to the Sacred Mosque, to expel its members, and polytheism are worse than slaughter. Nor will they cease fighting you until they make you renegades from your religion. If any of you turn back and die in unbelief, your works will be lost and you will go to Hell.
The Vedic approach, is perhaps the best. It gives unity without sacrificing diversity. In fact, it gives a deeper unity and a deeper diversity beyond the power of ordinary monotheism and polytheism. It is one with the yogic and the mystic approach... In this deeper approach, the distinction is not between a true One God and false Many Gods; it is between a true way of worship and a false way of worship. Wherever there is sincerity, truth and self-giving in worship, that worship goes to the true altar by whatever name we may designate it and in whatever way we may conceive it. But if it is not desireless, if it has ego, falsehood, conceit and deceit in it, then it is unavailing though it may be offered to the most true God, theologically speaking.
Ram Swarup, The World As Revelation: Names of Gods.
Wahabbis think that holy sites are a manifestation of polytheism. They deem anyone who opposes them to be polytheist. They believe Shias, Sunnis, and the Islamic world are polytheist.
I studied the Koran a great deal. I came away from that study with the conviction there have been few religions in the world as deadly to men as that of Muhammad. So far as I can see, it is the principal cause of the decadence so visible today in the Muslim world and, though less absurd than the polytheism of old, its social and political tendencies are in my opinion to be feared, and I therefore regard it as a form of decadence rather than a form of progress in relation to paganism itself.