The best example of this is found in the life of Advaita Prabhu in his dealings with Haridāsa Ṭhākura. Even though Haridāsa was born of a Muhammadan family, Advaita Prabhu offered him the first dish of prasāda after the performance of a sacred fire ceremony. Haridāsa Ṭhākura informed him that he was born of a Muhammadan family and asked why Advaita Prabhu was offering the first dish to a Muhammadan instead of an elevated brāhmaṇa. Out of his humbleness, Haridāsa condemned himself a Muhammadan, but Advaita Prabhu, being an experienced devotee, accepted him as a real brāhmaṇa. Advaita Prabhu asserted that by offering the first dish to Haridāsa Ṭhākura, he was getting the result of feeding one hundred thousand brāhmaṇas.
(Srimad Bhagavatam---3:16:8---purport).

In this regard, Caitanya-caritāmṛta (Antya 3.177-188) describes Haridāsa Ṭhākura's confirmation of the effect of chanting the holy name of the Lord.
keha bale—'nāma haite haya pāpa-kṣaya'
keha bale—'nāma haite jīvera mokṣa haya'
Some say that by chanting the holy name of the Lord one is freed from all the reactions of sinful life, and others say that by chanting the holy name of the Lord one attains liberation from material bondage.
haridāsa kahena,—"nāmera ei dui phala naya
nāmera phale kṛṣṇa-pade prema upajaya
Haridāsa Ṭhākura, however, said that the desired result of chanting the holy name of the Lord is not that one is liberated from material bondage or freed from the reactions of sinful life. The actual result of chanting the holy name of the Lord is that one awakens his dormant Kṛṣṇa consciousness, his loving service to the Lord.
(Srimad Bhagavatam---5:24:20---purport).

A Vaiṣṇava is in a higher position than a jñānī, and therefore Advaita Ācārya selected Haridāsa Ṭhākura to be the person to accept His charity. The Supreme Lord also says:
na me 'bhaktaś catur-vedī
mad-bhaktaḥ śva-pacaḥ priyaḥ
tasmai deyaṁ tato grāhyaṁ
sa ca pūjyo yathā hy aham
"Even though a person is a very learned scholar of the Sanskrit Vedic literatures, he is not accepted as My devotee unless he is pure in devotional service. However, even though a person is born in a family of dog-eaters, he is very dear to Me if he is a pure devotee who has no motive to enjoy fruitive activity or mental speculation. Indeed, all respect should be given to him, and whatever he offers should be accepted. Such devotees are as worshipable as I am."
(Srimad Bhagavatam---7:15:2---purport).

Sometimes devotees are personally attacked with violence. Lord Jesus Christ was crucified, Haridāsa Ṭhākura was caned in twenty-two marketplaces, and Lord Caitanya's principal assistant, Nityānanda, was violently attacked by Jagāi and Mādhāi. But still they were tolerant because their mission was to deliver the fallen souls. One of the qualifications of a sādhu is that he is very tolerant and is merciful to all fallen souls.
(Srimad Bhagavatam---3:25:21---purport).