everyone knows that hinduism is a recent word . strictly speaking it is not a recent word but a later word.
i tagged only hinduism because historically there is no indications as yet to show that it was followed by any cultures outside the subcontinent.say greeks , china , middleast etc.
and by 'hinduism' i meant those numerous sects and religions that shared some common things like , belief in vedas , gods and goddeses, similar rituals , guruparampara etc.
even the ancient yavanas (greeks) collectively meant these religions while coining the term 'hindu'
funny thing with gaudiyas ( not meaning you of course) is that they accept history selectively whenever it suits to thier purpose. for example , they would readily accept this 'origin of hindu ' theory but deny that puranas were written in later hindu ages and continued till 18th century.