CC Madhya 25.120 Translation:
Now please hear from Me about the process of devotional service, which is applicable in any country, for any person, at all times and in all circumstances.

Purport:
The cult of bhagavata-dharma can be spread in all circumstances, among all people and in all countries. Many envious people accuse the Krsna consciousness movement of spoiling the rigidity of so-called Hinduism. That is not actually the fact. Sri Caitanya Mahaprabhu confirms that devotional service to the Lord-the cult of bhagavata-dharma, which is now being spread as the Hare Krsna movement-can be spread in every country, to every person, in any condition of life, and in all circumstances. Bhagavata-dharma does not restrict pure devotees to the Hindu community. A pure devotee is above a brahmana; therefore it is not incompatible to offer the sacred thread to devotees in Europe, America, Australia, Japan, Canada, and so on. Sometimes these pure devotees, who have been accepted by Sri Caitanya Mahaprabhu, are not allowed to enter certain temples in India. Also, some high-caste brahmanas and gosvamis refuse to take prasadam in the temples of the International Society for Krishna Consciousness. Actually this is against the instruction of Sri Caitanya Mahaprabhu. Devotees can come from any country, and they can belong to any creed or race. On the strength of this verse, those who are actually devotees and followers of Sri Caitanya Mahaprabhu must accept devotees from all parts of the world as pure Vaisnavas. They should be accepted not artificially but factually. One should see how they are advanced in Krsna consciousness and how they are conducting Deity worship, sankirtana and Ratha-yatra. Considering all these points, the envious persons must henceforward refrain from their malicious atrocities.