“SOAS for instance has one guy who was anointed a Mahant, and he writes books with another guy who says Yoga is a cynical rebranding of Swedish exercises.”
I’m assuming you mean James Mallinson. I met him briefly in Jaipur and had been wondering who the white guy with dreadlocks was that I kept seeing around (here in the US it’s considered racist by people of color to wear dreads if you’re not black). To make a long story short, he doesn’t practice yoga, is largely a rich guy that likes the “sadhu lifestyle” (he’s a Baron in the UK), and studies ancient texts in the way a typical white academic would. But I will say for all my skepticism going into it, I read his “Roots of Yoga” and it was great.
It’s clear that the practice of yoga is syncretic and means many different things to many different people. We definitely should criticize all the white girls in the west that are using Yoga as a brand for their calisthenics, teaching without knowing anything about pranayama or dhyana. Their style of practice is so far from any Hatha practice I’ve done you can’t even consider it the same thing. Most of those standing postures they do I’ve never encountered from my Hatha teachers. What these white western women are doing is for the most part awful and pretty racist.
However, we should be equally skeptical of Hindutva making claims about what Yoga is while ignoring the long, syncretic history and how it grew and exchanged practices with Buddhists, Sufis, Jains, and all sorts of other sects and groups through thousands of years.