First of all let me say that I believe the Supreme dwells equally in everyone as paramatma. Since he is all-pervading he hears the prayers of everyone.
That being said, I think the Bhagavad Gita is the highest and best revelation
of that Supreme Being. Of course that is my shradda which is based upon my karma among other things. If I equate other scriptures with that which I believe was spoken directly by Sri Vishnu himself, then the Bhagavad Gita is no longer special. If I equate other names by which people choose to call their conception of a higher power with the 1,000 names of Vishnu, then the names Hari, Krishna and Rama are no longer special.
In India they have this idea that a persons religion is like their mother. Everyone has the right to think that their mother is the best in the world. If they don't tell me that my mother is the same as theirs then we can live peacefully as brothers. If they don't tell me to disown my mother in order to embrace theirs, then we can live peacefully as brothers. OM SHANTI