No one was more vocal in condemning Vaishnava aparadha, than Vrindavan Das Thakur. He quotes the Naradiya-purāna to say, "One who is openly fallen hurts…
The scriptures have stated the main reason for the appearance of Lord Sri Krishna Chaitanya Mahaprabhu:
śrī-rādhāyāḥ praṇaya-mahimā kīdṛśo vānayaivā- svādyo yenādbhuta-madhurimā kīdṛśo vā madīyaḥ…