Like ive mentiones, one should not disrespect other forms. Even in the nector of devotion, it clearly states one should not be disrespectful of demigods. Puranas, vedas, gita are all needed for the human soceity to understand about the god, we cant compare which is greater, the purana, the vedas or the gita. Individual religion make the individual form to reach salvation. Knowing about god should never enter into argument when, especially within humans, im not as well learned as you or others over here, im still learning. But the clearity should be there as an ordinary beings, we are not in the platform to argue about which is better. Hinduism, Islam, Christianity or Buddhism? When one learns to compare in this material world without proper guidance, it comes to argument or non satisfaction, and it will be a never ending and will still be searching for the answers. When the love for god is intense one would realise within themseleve the right path, but ofcourse with proper guidance.