If hindus of any caste or alnguage or sect r not allowed in temple, it is discrimination.
If non-hindus r not allowed in hindu temple, it is not discrimination but "reasonable classification". For puerposes of allowing entry into hindu temple, classifying people as "hindus" and "non-hindus" is "reasonable classification".
At this rate, tomorrow this VS Achtanandan will say that not allowing men in ladies toilet is discrimination. Communism is a variety of fanaticism which dims people's intellect.