We all agree that these institutions are required and there has to be balance of power. What Modi has convinced majority of people is that a.) these institutions are not incorruptible b.) these are being funded and controlled by foreign entities. c.) The controlling entities have no skin in the Indian democracy or people. The opposition is losing power because they are not able to convince these people otherwise. Democracy is just the outcome of elections and voting.
Just equating everyone with Hitler is shallow and won't win any arguments - it is also very demeaning to all the people who actually suffered.