Only 50% of the ideas which Periyar exponed is correct and rational while other activities seem to be opportunisms to quote of something out of the box to attract attention and gain publicity.
I do not know how the director reacts to his garlanding Vinayakar and Rama Idols who were the Gods dearer to Hindus. As the current day politicians I do not know if he would have tried it with other religions. If he had done so, we could have appreciated his equality in thoughts against religions.
I could see him as only a normal person with some reformal thinking and gained publicity because of his capacity to articulate the mass opinion. As we could see in the current day politics of being against God in the Public and and being a devotee in the private. This is nothing but hypocrisy.
Finally, as Hinduism usually does and no other religiion in the world does, we would like to absorb the good things presented by him and leave alone the other.
Current day philosophy is freedom to self to do whatever they wish and advise only to others - let it be Hindi/English learning etc. Forcing their philosophies on the not too aware public and their allow their families to live and enjoy the benefits of those defied to the public.