“Sarva-dharma-samabhAva was unknown to mainstream Hinduism before Mahatma Gandhi presented it as one of the sixteen mahAvratas (great vows). in his booklet, MaNgala-PrabhAta. It is true that mainstream Hinduism had always stood for tolerance towards all metaphysical points of view and ways of worship except that which led to AtatAyI-AchAra (gangsterism). But that tolerance had never become samabhAva, equal respect for all points of view. The acharyas of the different schools of Sanatana Dharma were all along engaged in debates over differences in various approaches to Sreyas (the Great Good). No Buddhist acharya is known to have equated the way of the Buddha to that of the Gita and vice versa, for instance. It is also true that overawed by the armed might of Islam, and deceived by the tall talk of the sufis, some Hindu saints in medieval India had equated Rama with Rahim, Krishna with Karim, Kashi with Kaba, the Brahmana with the Mullah, pUjA with namAz, and so on. But, the sects founded by these saints had continued to function on the fringes of Hindu society while the mainstream followed the saints and acharyas who never recognized Islam as a dharma. In modern times also, movements like the Brahmo Samaj which recognised Islam and Christianity as dharmas had failed to influence mainstream Hinduism, while Maharshi Dayananda and Swami Vivekananda who upheld the Veda and despised the Bible and the Quran, had had a great impact. This being the hoary Hindu tradition, Mahatma Gandhi’s recognition of Christianity and Islam not only as dharmas but also as equal to Sanatana Dharma was fraught with great mischief. For, unlike the earlier Hindu advocates of Islam and Christianity as dharmas, Mahatma Gandhi made himself known and became known as belonging to mainstream Hinduism.”

History of Hindu-Christian Encounters (1996)