Topic No. 01) Blaming a BK is a Sin
The burden to society is bad habits. A nonvegetarian person consumes more from nature than a vegetarian person. A BK tries to get rid of bad habits. For a person who does not believe in karma philosophy, smoking, drinking, taking drugs are the MAIN bad habits. Most of the BKs do not have these habits. So, does a non-believer in God has right to blame BKs? Population is increasing. BKs do not add to population.
Eventhough BKs feel that their knowledge is the highest, they do not force anybody. They do not tempt others like some missionaries do to convert religion. BKs do not accept donations from agyaanis (there may be some exception or relaxation in this, particulary as the end of Iron Age approaches). From the above, BKs are are least burden to society. How can they be blamed?
A religious person believes in karma philosophy. He can blame a BK provided his sins are lesser than whom he comments. Else he also looses right to blame BKs.
Topic No.02) A BK has no right to blame others
A BK has no right to blame others even if he is insulted by others.
A BK believes that his karma is the cause for his sufferings. He also has faith that at present his destiny is in his hands. So how can he blame others?
A person having high income can lead a royal life. When he sees a poor person committing mistakes, his first reaction should be pity on that person. Then he can report mistakes of the poor person to police or govt. But he cannot take law into his hands.
A BK has faith that he can earn padam (countless or maximum ever possible) in his every kadam(step, thought). In front of him, all are poors(according to his faith). A BK has blessings directly from God [(as per his own faith). Sometimes I may not add these words, it is understood]. So it is his responsibility to keep his mind happy even under worst circumstances. So how can he blame others?