While in general I'd agree with you that Hindutvas still have a long way to go before catching up with Islamists but in India's context Hindutva terrorists are definitely a bigger threat. It is basic math. There are just way more jobless Hindu youth ready to get into the "nationalist" cult of Hindutva terrorists. With a jobless economy and young population, it is the perfect hunting ground and they have the backing of the state machinery too because "polarization" helps them win elections.
What I said. About the numbers. And state support.