Adharma is the Sanskrit antonym of dharma. It means "that which is not in accord with the dharma". Connotations include betrayal, discord, disharmony, unnaturalness, wrongness, evil, immorality, unrighteousness, wickedness, and vice. From Wikipedia
Mohan Bhagwat calls for societal unity and visible strength, condemning religiously motivated violence and urging a strong response to deter future attacks.