Vandalism - 1947 post independence. Corruption - Boffor Case. Communalism - 1) 1984 Sikh riots. 2) Rajiv Gandhi Unlocked Babri Masjid (which had Ram Statue) for general public as a Hindu temple in 1986 for Hindu vote sympathy which was locked for past 50 years.
So Congress is no better than BJP. Since Both are communal, So Vote for BJP which can bring development for Karnataka farmers as well as for IT.
