According to you,the belief in one god/person and his saying is understood complete while a tradition developed by constant debates are understood inferior and closed. But i think, it is paradoxical. How could a vision of one person be considered as full, complete and rational? When there is no debate, no discussion and a complete denial of other views, how could it be considered as giving a wholesome picture??? It might also be possible that the person got deluded or was living in hallucination. The creed and belief of complete explanation by one person as superior to the work of debates of many is again hypocritical. And, here lies the difference between the monotheistic and panentheistic monotheism. In the "superior" monotheism, there is only one person who became god because of his virtues. But it is a very closed vision of extensions of other human beings. According to Islamic tradition, only Prophet had that capacity while others do not. The Jannat could be achieved but not godhood. While in Hinduism, the godhood is granted to all. Every being is a possible god and this possibility could be attained and decided by your Karma. I guess, you are not unaware of dojhakh which is also dependent upon deeds.
However, let me clear more about Sanatan Dharma. It is just not a theology or saying of a messenger of god. It is a corpus of multitude of other knowledge forms. It is about theology, philosophy, logic, medicine, environment, ethics, practices-physical as well as metaphysical, spirituality and many more. It is not something that if you convert this much number of people to your faith then you will be granted Jannat. It is about the development of human possibilities which is now considered as true in Scientific world in form of Quantum Physics. It is about leading a way of life as well as living. Sanatan Dharma is based upon two complimentary tools: rationality and practice. Both reason and practice are necessary for spiritual advancement. Without rationality, practice may lead to fanaticism while without practice the spiritual knowledge will be dry and monotonous.
The Sanatan Dharma is based upon the principle that every form of life is a form of that eternal source of life. It may be given any name or form i.e. phenomenological it may be as varied as the world itself but ontologically it is only one. This is called monotheism and not the worship of one person of his saying. We all know, that human development lies in its inquisitiveness and not in blindness or bondedness to any single creed. The metaphorical forms attained by idols is the sacred imagery that helps the person to concentrate on his or her personal god, meditate on it. It is just the beginning but the problem with people of lesser tendency thinks that it is the final form.
My dear friend! there is nothing final. The Human life is an exploration of its own self. That is why we do not stick to any result, we say that something is more is beyond this - "Nayti-Nayti".
And why do you want to change the entire world in one common form. Dear this way, we will loose the ecstasy of this world which is only because of its multiple forms. Don't you like variety of colours, people, animals around you? and when everything has become uniform then how are you going to assert that you are superior.
For more discussion on term Sanatan Dharma, wait for next mail.