I dont think Roma should be Hindus. We need to disagree. Religion has nothing to do with culture.
Every Indian state Has different Culture ,Language & traditions .
Tamil Hindus are Totally different than Bengali Hindus (or other Hindus ) ...........After reading about Roma people I think Roma = Banjara Community .
and these Banjara community member migrated to Europe after race Mixing they have Fare Skin .
now the culture of Banjara community is different than Rest of the Hindus .............but there is no conflict .
there are thousands of Tibetan (Buddhists ) refugees Living in India without any problem they successfully integrated into Indian society even with a different culture & language ............but there are religious conflicts between Hindus and Muslims (converted ) and Christians (converted ) even with same language & similar culture .
there are Many fair skinned people in India (especially North India ) so skin color would not create any problem , Look at the kashmiri Girls
.........Look at the skin color of Modi & trump ...........if You can speak local language then nobody will be able to identify .
but if Government accepts 10 Million Muslims or Christians then it will Change demography & create religious conflicts & riots .