Very sad that parsis are declining.
However, they're declining everywhere, including the OP's beloved Hindustan. This is common knowledge. We all know it. The children of Zoroaster themselves know it too, even though some cynical efforts are made from certain directions at declaring this decline "a Muslim dependent issue".
A recently held festival in India debated on ways to increase the dwindling population of India's Parsi community, writes Bachi Karkaria
www.google.com
If the good doctor would care to be objective for once rather than gushing exclusively about one of his adoptive homelands over all others, then hopefully folks might be able to establish a root cause for this global decline.