The concept of ‘Akhand Bharat’ dates back to the 1930s and the map is displayed prominently in the newly built Indian parliament last year. So, it is not some fringe ideology,
We too quickly forget our history if we don't expect that or think popularity confers rational or moral legitimacy: Mao, Lenin/Stalin, Hitler, not to mention Pol Pot, Suharto, Pinochet, etc etc. were very popular.