Although it is not only in western India that people were contaminated by association with Muslims, it is a fact that the farther west one goes in India the more he will find the people to be fallen from the Vedic culture. Even until five thousand years ago, when the entire planet was under the control of Mahārāja Parīkṣit, the Vedic culture was current everywhere. Gradually, however, people were influenced by non-Vedic culture, and they lost sight of how to behave in connection with devotional service. Śrīla Rūpa Gosvāmī and Sanātana Gosvāmī very kindly preached the bhakti cult in western India, and following in their footsteps the propagators of the Caitanya cult in the Western countries are spreading the saṅkīrtana movement and inculcating the principles of Vaiṣṇava behavior, thus purifying and reforming many persons who were previously accustomed to the culture of mlecchas and yavanas. All of our devotees in the Western countries give up their old habits of illicit sex, intoxication, meat-eating and gambling. Of course, five hundred years ago these practices were unknown in India-at least in eastern India-but unfortunately at present all of India has been victimized by these non-Vedic principles, which are sometimes even supported by the government.
Ref >> Srila Prabhupada Vani.