You should not use the religion word in relation to Netaji . There is a reason he was able to command the following he did , and do the things he could .....something which "No Other Indian " leader at that time could - not Gandhi , Not Jinnah , Not Nehru , no one .
In Indian books his entire contribution is covered . I dont know which Indian history book you referred to ....as far as you not recalling his name - its quite simple ...you never read about him, in detail.
The only issue here is The Indian Govt till now , from the time Nehru became PM has never , ever thought of giving him proper credit. No holidays on his birthday , no commemoration of any sort - Yes he is actively remembered by Bengalis , but the rest of India only just reads about him in their textbooks and thats it.
The man chose a path which was a million times tougher than sitting in India and going up to the "Firangi" Sarkar with a begging bowl for dominion status and such like concessions . I personally would prefer a fighting , struggling attempt over weak , reconciliation any day -- apparently its why most other Colonial independence movements dont respect our non-violent struggle very much .
I dont expect the Pakistani Govt to commemorate Netaji . When they dont respect Bhagat Singh then Netaji seems to far -fetched but reading unbiased history you should be aware that the man had the guts of a Tiger and a brain to organize an armed response and a govt "recognized" by " 9 " countries of the contemporary world ...something no other Indian leader could accomplish .