Most people from the west think that Hinduism is a religion, but it is not so. The Indus (Sindu) valley culture is named as Hinduism by the Muslim invaders in the past, who were not able to pronounce Sindu they called Sindu culture as Hindu culture. Thus name Hindu came into existence. Hinduism is mere culture not religion. This Hindu culture consists of different caste, creeds, ideologies, beliefs and way of life in different regions of India.
Santana Dharma was pure Vedic religion prior to the existence of the present day Hinduism. Hinduism is not pure Vedic religion; it is hotchpotch mixture of many ideologies adopted by other ideologies, cultures and traditions.
As one goes deeper in annals of the history he becomes aware of the fact that, the so called present Hinduism has adopted many things from Buddhism, religion of Abraham, Jainism and Islam. If one goes deeper enough he will become aware everything is mixed up and messed up in time.
No one is taken pains to rectify it because; because people have been inherited them, from their ancestors, and they think it is blasphemy even to hear anything against their inherited religion and belief. Once one gets involved with the religious class it is the end of the pursuit of truth.
J.K and Osho went deep in to it and exposed their fallacies to some extent, but it is only in surface level. Maharishi, Dayananda in his book Satyarth Prakash clearly mentions what is Vedic and what is non-Vedic. But the orthodox class still wants to maintain the inherited falls legacy as the supreme truth. Thus, there is no use of arguing or convincing the people who accepted their false legacy and propagate them as truth. Since, the pursuit of truth is a very personal journey; and it is not the pursuit of the argument, there is no need for to indulge in convincing others, seeker of truth has to get convinced for him-self to drop all conditioning, which he has inherited from his belief system.
Prior to Sri, Sankara in 8th century there was no Advaita in Santan Dharam. Santana Dharma or Vedic religion has no founders whereas Advaita and qualified Advaita and Dwaita are identified with their founders. All of them have non-Vedic rituals barred by the Vedas. The dualism came only in 12 the century. The orthodox Advaita and Dwaith area adulterated add-ons . Both Advaita and Dwaita schools based on Vedas and they condemn each other with Upanishads and Puranic citations and try to prove they are right, and others are wrong.
The religion including orthodox Advaita is nothing to do with the ultimate truth or Brahman because they worship idols, human worship, and symbol worship and indulge in non-Vedic ritual barred by Vedas.
That is why Yajurved says, not to worship the things which are part of the falsehood.
They enter darkness, those who worship natural things (for example air, water, sun, moon, animals, fire, stone, etc).
They sink deeper in darkness those who worship sambhuti. (Sambhuti means created things, for example table, chair, idol etc.) ~(Yajurved 40:9)
“Deep into shade of blinding gloom fall asambhuti’s worshippers. They sink to darkness deeper yet who on sambhuti are intent.”~ (Yajurveda Samhita by Ralph T. H. Giffith pg 538)
“They are enveloped in darkness, in other words, are steeped in ignorance and sunk in the greatest depths of misery who worship the uncreated, eternal prakrti — the material cause of the world — in place of the All-pervading God, But those who worship visible things born of the prakrti, such as the earth, trees, bodies (human and the like) in place of God are enveloped in still greater darkness, in other words, they are extremely foolish, fall into an awful hell of pain and sorrow, and suffer terribly for a long time.”
(Yajur Veda 40:9.)
So, Yajur Veda indicates that:~
They sink deeper in darkness those who worship sambhuti. (Sambhuti means created things, for example table, chair, idol etc (Yajurved 40:9)
Those who worship visible things born of the prakrti, such as the earth, trees, bodies (human and the like) in place of God are enveloped in still greater darkness, in other words, they are extremely foolish, fall into an awful hell of pain and sorrow, and suffer terribly for a long time.” (Yajur Veda 40:9.)
The religion of the Veda knows no idols:~
Max Müller says:- “The religion of the Veda knows no idols; the worship of idols in India is a secondary formation, a degradation of the more primitive worship of ideal Gods.”
Therefore, there was no individual god or temples and worships in Vedic religion, which existed prior to Buddhism. Thus the individualized gods and temples must have been built later on, when the worships of idol were introduced. Thus the Vedic religion which existed in the past was free from idol and nature worship and idol worshiping rituals.
Thus, the present day’s worship of individual gods, created things, nature and human are against Vedic teachings, and it looks like it has been fabricated and introduced by priest craft. Since it, has passed on from one generation to the next it is hard for the people to believe the truth of their own religion, because they have sentimentally and emotionally involved in it, and they refuse to accept anything else other than their inherited beliefs.
It is impossible to find and realize the truth via religion and scriptural study. Even Upanishads conform this.