The protest is over the fact that Gandhi, the satanic god of peaceniks the world over, was a racist bigot who maligned and mistreated many of the religious and social outcasts of India.
My slight distaste for Gandhi, after reading dozens of dishonest biographies of him, comes down to the fact that he tried to win independence for parts of India, by threatening to have his followers support Hitler in WWII.
Hitler damaged Britain so severely she could not have held on to India as a colony, even without the evil threat from Gandhi.