Sometimes one hears it suggested that pagan deities are simply the "God whom we all worship" in a different garb and cultural context. So that, however convinced we are that our inherited perception of God is divinely revealed to us, we might licitly respect other, albeit imperfect, manifestations of God. Perhaps all the "gods" are simply masks behind which lies "the same one God".
Such an attitude is not irrational. In fact, is was widely held in the early centuries of the Christian era. I am not an expert on Hinduism, but I think it is today the belief of educated Hindus. It deserves the respect we owe to all good people who hold to an erroneous religious faith.
The good people who held it 2,000 years ago were those who worshipped the goddess Isis; an ancient Egyptian deity hellenised and much promoted by the Ptolemaic (Macedonian Greek) rulers of Egypt in the centuries between Alexander the Great and the the absorption of Egypt into the Roman Empire. Cleopatra VII herself was, indeed, the father-loving goddess the new [i.e. Incarnate] Isis.
You can explore Isiacism in Book 11 of the Metamorphosis of Apuleius ... a work available in paperback translation. Or, if you have access to an academic library, in Plutarch; or in P. Oxy 1380 of the Oxyrrhynchus papyri (modern books about the cult are often unreliable and are not recommended).
Cult members believed that Isis was the proper name of the deity, and that the cult as propagated by the Ptolemies was her authentic cult. But they believed that she was in fact the same deity that was worshipped in every place under a variety of names and by different cults. So, if you woshipped her in one place as Hera, in another as Athene, in another as Diana, you were worshipping the same divinity. Behind all these different external formats, the deity was One. Accordingly, if you had been initiated into the Mysteries of Isis, there was no reason why you could not also be initiated into other cults, such as the associated cult of Osiris, or that of Mithras ... In Apuleius, indeed, the subject of the narrative seems to be rather keen on 'collecting' such initiations. Quite prbably, some of his Christian converts at Corinth whom S Paul warned against idolatry had been people of such a type ... which is why such vigilant pastoral care needed to be taken of them and their religious activities.
This is one form of a religious culture sometimes known as 'syncretism'.
In the time of S Paul, Isiacism was extremely popular (particularly among women, as Mithraism was among soldiers). Had you asked a contemporary of S Paul "What is the Future of Religion?", you would probably have been told 'Isis' or 'Mithras'. In a cosmopolitan and mobile world, these sophisticated and personal international 'mystery' cults from the Orient had an appeal which the old, rather distant classical tutelary gods of the polis did not have.
Christianity stood out against such syncretisms. Pagan gods, S Paul taught, were either non-existent; or were demons. In either case, they needed to be very firmly shunned. The advice available to us in Scripture affords no support for a policy of respecting Isiac or Mithraic or Hindu cult objects as a way of demonstrating polite respect for the persons of Partners in Interfaith Dialogue (otherwise known as Idolaters). And I can find nothing in the advice of Vatican II which in this matter contradicts Scripture. If I did, it might not be Scripture that I would downplay.
This is the historical background against which we have to understand the firm formulation in Acts: "There is no other name under heaven by which a man may be saved except that of Jesus".
One of the reasons why Christians have always spurned 'Freemasonry' is that its ritual, so it is reported, combine and mingle together the One True God with the names of heathen so-called divinities ... in other words, the very essence of syncretism.
Even very Eminent people need to be warned: "Shun Idolatry!"