While you wait for other answers, here is an answer from similar a question from couple of weeks back: [Despite the influence of monotheistic faiths. How has Hinduism survived in India] (https://old.reddit.com/r/AskHistorians/comments/at1cwz/despite_the_influence_of_monotheistic_faiths_how/ehdda6z/)

Follow-up questions: How did the Chinese Folks Religion survived just like Hinduism?