The development of Indian nationalism is a fascinating topic, and one
I've actually posted a thread on in this forum before.
For an interesting perspective, I'd point you to
this chapter from a book called
My Mother India by
Dalip Singh Saund, an Indian-American who was the first Asian elected to Congress and a brilliant guy. In the first few pages of the chapter, he lays out that "Indian" identity has existed for much longer than many Europeans at the time believed - and astutely notes that its great flaw is the tendency to get it mixed up with
Hindu identity.
The interesting thing about this chapter in particular is its time - written in the midst of the Indian independence movement, he correctly predicts its course, but also believes Hindi will become the language of India, not English (this
became a major political issue in India in the '50s and '60s).
To answer your original question: yes, I think it's possible to have multiple Indian independence movements - nationalism stronger among the peoples of India - and result in multiple independent countries in what is now India in the subcontinent. But you would need a POD far earlier than 1900 - by then, the movement was too much on its present course. The POD would need to be in the early 19th or even 18th centuries.
Other forum members who may also be able to provide insight here are
@Flocculencio,
@Nataraj, and
@Badshah. Hope this helps, though.
Cheers,
Ganesha