Has Hinduism propagated a discriminatory caste system historically

In actuality, Caste discrimination is rooted not in religion but culture. Caste was an ancient system of occupational class delineated in Hindu texts that over the years developed into a rigid social hierarchy. The lowest castes, or untouchables, were marginalized and faced persecution. But many modern Hindus have argued that caste-based discrimination is not intrinsic to Hinduism and should not be thought of as religiously sanctioned.