Please do not confuse the issue. There is no higher caste - lower caste issue here at all. In Sabarimala, Individuals of all communities and faiths and strata of society can come and take Darshan. It is the 41 day ritual which needs to be followed. This involves doing daily Pooja etc. Women cannot do Poojas and holy rituals during the menstruation period of their month. Hence they would not be able to do the 41 day rituals and hence Women of a menstruating age group are asked to avoid Sabarimala