(1) "Mein Kampf" is just another book for Indians. Sure it is available in bookstores, it isn't particularly popular. Most people have read it, and most think it is a turgid bit of prose.
(2) Why should Indians (or Pakistanis for that matter) have the same level of Hitler Phobia and/or Holocaust guilt Germans have? I thought the German "guilt" was all about how Hitler and co misled their ancestors into The Holocaust and other dirty deeds. Indians and Pakistanis were colonized by the British at the time of WW2 and many of our ancestors fought against the Nazis and the Japanese. (Some of them fought for the Nazis/Japanese trying to attain independence for India from the British).
Nutshell: People who had nothing to do with the Nazis or the Holocaust and for whom the Nazis and Hitler were "people far away" fighting and winning aginst an oppressive colonial power don't have as much of a bad reaction as people who were invaded/ruled/slaughtered by them.
Big Deal.
Genghis Khan built mountains of skulls during his invasions but would Germans blanch if they saw a Muslim with the name "Genghis" or "Timur" or think his name is inappropriate?
As something to chew on, many babies born in the Middle East / Pakistan etc are being named "Osama". An American child with such a name would find social situations difficult I imagine. No such stigma in Pakistan. At some point will we see a headline "Saudis cringe at Osama's popularity in Pakistan"?
To be even more controversial it could be argued that Bush and co "killed a million Iraqis" for no real purpose. Should all Americans hate and abhor W? Stalin and Mao were responsible for more deaths than Hitler Should Chinese be surprised that some few Americans think Mao was "cool"?
fwiw I personally thing Hitler was a charismatic and thoroughly evil person. Most Indians who are aware of actual history feel the same way.
But I am also aware concentration camps were "invented" by the British during the Boer War and the large scale deaths of non combatant Boer women and children in these camps could be called genocide if it happened today. Should we hate Lord Salisbury (and Winston Churchill for that matter) too? I don't see many Britishers being ashamed of them.