Extreme right wing, cultist, racist kind of movements don't last that long..
but societies have used these kind of movements to cleanse their countries. .nazi went too far, but the western world, Japanese, Russians, Chinese, the muslims have employed these kind of extreme mentality to clear what they deemed unnecessary..Mao, Stalin...The sunni employed it to cleanse it's countries of almost all their minorities. .
There was a feeling building up among Indians where many feel a lot of cleansing is needed in the society, governance, appeasement of vote bank groups which was proving detrimental to the country.
I for one feel we need a reign of such a nationalist "on the verge of" extreme right wing group for a good 10 to 15 years so that there is some degree of cleansing...We can go back to becoming "secular" again just like what the westerners did....and that's the thinking behind most of the general vote bank.