It is not whether Rama existed or not. The facts are :there are the remnants of a bridge under water ..... and the government proposes something to make lanka-india route by sea easier..... why not agree to that ? ? ?
Even if the Bridge was built by RAma did he intend it to converted into a "protected and ancient monument " .If one can rely on the Ramayana , it was made for a purpose which it definitely served.
The Vedanta Shastra ( Indian / Hindu Philosophy /Tatva Sastra) is fraught with advice from the great Rishis that nothing in this universe lasts for ever......except the Brahma.
"....aaagama-paayina anithya " ( everything comes and goes.....nothing lasts for ever ) is what Bhagvan told Arjuna in the Bhagvad gita (2:14) about everything in the universe.
Why should the remnants of the Ram Sethu not be abolished ..........
Or has all the Hindus who want to protect the Ram Sethu forgotten this great advice in the Gita? ? ?