Why should a party that gets only 50-60 seats and 3-4 crore votes in Lok sabha decide the fate of 110 crore people in India?
Your post itself shows that Communism is a fringe outfit that is terrorising rest of India and its progress.
About Bengali Intelligence - Some of Bengal's famous and intellectuals were non communists. Swami Vivekananda and Subash Chandra Bose were great bengalis who did not agree with Communist ideology. Shyam prasad Mukherjee is also another example