The reason why caste or community is bandied about in Northern India esp is not LOWER INTELLIGENCE.It is because of a chronic lack of education(less than 50%) & social reform as was seen in the Southern & Western states.UP has produced most of India's prime ministers(from different states),but the state is still akin to the wild wild west where everyone incl. the afore mentioned prime ministers lived for themselves.If you & I were living there,we would probably be voting on divisive lines.If anything the fact that these Social justice parties ar a sign that India's democratic polity is evolving but it will take a long time.
No, I didnt imply that it was indicative of lower intelligence, but once people tend to group think it automatically leads to dumbing down of electorates.