Congress President Rahul Gandhi attacked Prime Minister Narendra Modi on Saturday and asked what kind of a Hindu he is that he does not understand the foundations of Hinduism."It is fascinating for me that what is the essence of Hinduism. You please study Hinduism. What does Gita say? It says that Knowledge is with everybody. Knowledge is all around you. Our Prime Minister says that I am a Hindu but he does not understand the foundation of Hinduism."What kind of Hindu he is? That is the contradiction," Gandhi said during an interaction with the business community and professionals here.Gandhi alleged that Modi thought he was the repository of all wisdom and because of it he took decisions like demonetisation without consulting anybody and the surgical strikes."Modi says knowledge is with me, knowledge is with me, everything .....," he said.Drawing a comparison with late Atal Behari Vajpayee, the Congress chief said his party and Vajpayee used to fight each other "but his (Vajpayee's) tone, his language was different. He had character and respect," he said.