It is the stupidest kind of logic. Nobody said all hindus are angels. Like all other human entities there are both good hindus and bad hindus. Shree Krishna has To destroy "Duscritam" and to protect the " Sadhunam", To re-establish "Dharma" I am born again and again. So only idiots can raise the example of Arjuna, Drona and Duryodhana in this context.
