This was something that was suggested on Twitter (or emerged out of a discussion on Twitter): why can’t the Kalash have the option of relocating to Ladakh? It’s not that different of an ecosystem, and there would be less cultural pressure to change and/or threat of assimilation.
The Indian government imposes a no-contact policy for the Sentinelese for the sake of their cultural and biological integrity (they would probably die of disease). I’m not proposing this for the Kalash, but at least bringing them to Ladakh would prevent the imminent threat of assimilation, though the individual appeal of Delhi would still be there.
There’s a lot of anger from Hindu nationalists online. Often toward Muslims. I get the reasons. But this is something that is constructive and positive. The Kalash are not a fossil race. But they preserve something that is unique and soon to be lost to the world.