Marx and Engels themselves can never be taken simply at their word: the errors of their writings on the past should not be evaded or ignored, but identified and criticized. To do so is not to depart from historical materialism, but to rejoin it. (...) To take 'liberties' with the signature of Marx is in this sense merely to enter into the freedom of Marxism.
Pure Vedantic Hinduism as described in particular in the Upanishads is monist and either pandeist or panendeist - Brahman is the Universe, we (as Atman or "God-souls") are a part of Brahman and Brahman itself, parts separated from the whole to be able to appreciate the whole and ever seeking to rejoin the whole and its perfect state of being as all things. Brahman in the Upanishads is not a being that is worshipped - they make it absolutely clear that Brahman is indifferent to worship and is not the object of worship.