OK…although that was not what the debate was about.
There are various interpretations in Hinduism, and Arlietter’s interpretation seems to be very different from mine. He is right - there is a certain section of society that uses Manusmriti as a basis for casteism and caste based discrimination. However, thats probably the only aspect of Manusmriti thats even remotely in practice.
Unfortunately the debate has gone off on a tangent. If you are really interested, I would recommend reading up on Hinduism. There is enough material available online.