This is not true. caste is the foundation of the vedic. Its the division of labour not laboreres. For the scientific minided with verifable facts read the short manual by an actual scientist and later political reformer https://ccnmtl.columbia.edu/projects/mmt/ambedkar/web/readin...
The person you’re replying to has a history of denying known issues with Indian society and blaming the britishers and/or Islamic invaders like the Mughals for all of India’s issues. I tangled with them not so long ago. Wasn’t worth the effort, imho.
With Mughals its whole different story. Instead of discouraging religion, some emperors tried to solve by marrying Hindu women. But their kids has to belong to one of the Koran or Vedic shit. It did not solve either anything. Now both of you go downvote me.