Hinduism is like the Ganga, pure and unsullied at its source but taking in its course the impurities in the way. Even like the Ganga it is beneficent in its total effect. It takes a provincial form in every province, but the inner substance is retained everywhere.
I call myself a Sanatani Eternal Hindu, because I believe in the Vedas, the Upanishads, the Puranas, and all that goes by the name of Hindu scripture, and therefore in avataras and rebirth.
What may appear as truth to one person will often appear as untruth to another person. But that need not worry the seeker. When there is honest effort, it will be realised that what appears to be different truths are like apparently different countless leaves of the same tree.