Strega Mama
The way a gentleman from our local Janist temple explained it to me was that we are all Hindu even if we don't know it, because ALL gods from ALL religions are all aspects of the Brahma. Hindus consider themselves monotheistic, not polytheistic. I guess this might be better labeled as a soft monotheism, then, perhaps?
The Hindus I grew up with called it inclusive/exclusive monotheism, matching up with soft/hard polytheism.
The problem with Hinduism is that different diaspora and groups interpret it differently. At a base form just from the Vedas, it's this all-in-one inclusive monotheistic form, while the "uneducated" (as Lokiogma stated, which I find slightly offensive, but I can see where he's coming from) will view it as pure hard polytheistic.
But I'm educated and my experience with the Hindu deities have shaped it that I experience Hinduism from a hard polytheistic perspective.