There were "Shuddhi" movements in North India. But those were reactions against the "conversion" threat
There has been no institutional Hindu reaction to modernity
But it is largely endogamy and caste that ensures traditions remain vibrant and people remain rooted
In part because of caste, Hindus haven't felt the need for an institutional reaction to modernity
Hindus are really "comfortable" with modernity. They have no qualms with it.
I sort of disagree. I think deracination threat is lesser among Hindus because of caste. Which is why modernity is not seen as problematic let alone an existential threat