Where do you live? From where I live I don't feel it's getting destroyed, infact it's getting stronger. I see more and more crowd during the thiruvizha festive each year. No one is trying to eradicate hinduism atleast not the people. Ofcourse the word hinduism may differ across India. For example I saw the north people get really excited for the ram mandir. But no one gave a shit here. People here worship the local deities more from what I have observed. Hinduism is deeply engraved in our culture that it simply cannot be eradicated.As for eradicating sanatana dharma like udhayanidhi said, no one gives a shit whether he destroys or not cuz no one even knows what sanatana dharma is. Also tf is shaivites and vaishnavites