This is the specific kindness of Lord Caitanya. In this age no one can say that he is free from sin. It is impossible for anyone to say this. But Lord Caitanya accepts all kinds of sinful persons on the one condition that they promise not to indulge in sinful habits after being spiritually initiated by the bona fide spiritual master.
There are a number of instructive points to he observed in this incident of the two brothers. In this Kali-yuga practically all people are of the quality of Jagāi and Mādhāi. If they want to be relieved from the reactions of their misdeeds, they must take shelter of Lord Caitanya Mahāprabhu and after spiritual initiation thus refrain from those things which are prohibited in the śāstras. The prohibitory rules are dealt with in the Lord's teachings to Śrīla Rūpa Gosvāmī.