Hinduism and Hindutva are completely different terms. Hinduism is pro religious harmony while Hindutva is pro religious extremism that ensures never ending hatred and division among society.
Hinduism -> Hindu Religion
Hindutva -> Hinduness (Coined by VD Savarkar).
Hindutva fascists talk about a Nation based on Hindu religion, "Hindu Rashtra". Therefore the fanatics fantasizing and working towards achieving the goal of Hindu Nation by creating divisions by spreading hate among the populous, practicing religious extremism(hindutva) are known as Hindu Nationalist.
His death was caused by that very revolutionary thing he made a name about. He was against locking of big chunk of humanity's knowledge behind paywalls making it effectively inaccessible for everyone and mostly from third world countries.
You certainly are demeaning his sacrifice by insinuating his suicide didn't had any thing to do with going against JSTOR and hence US capitalism.