[usaneisfiecup]

Hinduism of today is a product of evolution for thousands of years. It has undergone many many changes. Many deities were given up, new ones have come to be added. Perhaps this is the only religion where such changes have been permitted. பழையன கழிதலும் புதியன புகுதலும் வழுவல கால வகையினானே
Do you know that Vedic samhitas do not contain a deity called Siva. The hymn rudram, which is a very special prayer for Siva today is a praise for Rudra, who has more differences from Siva than similarities. Narayana gets first mention only in the Brahmanas and not in the earlier Samhitas. In our own times we have seen the images of Ayyappa getting recognition in Siva temples, just in a mater of 50 years. In a thousand years hence, a totally different set of deities will be worshipped and the present deities may meet the fate of Indra.
Hence, no use asking whether Indra should be worshipped or not. There exists one, scholars call it differently.एकं सत् विप्रा बहुधा वदन्ति Rik 1.164.46