Something tells me, we haven't got to the end of this particular story yet...
That the human body works as a semi-conducting liquid crystal is a tenet of physics, not religion. But this scientifically-proven DC electrical ‘energy’ system powering the body is intangible, and thus can very quickly veer off into matters of the soul, and the spiritual realm - and that’s where the great danger lies.
To put it very crudely, Western medicine is based on bio-chemistry, and leads people to atheism and a completely materialistic view of health and life.
Most alternative therapies are based on bio-physics (although many of these therapies’ own practitioners actually have no idea about the science underpinning what they’re doing) - and I’ve seen it lead people straight to avoda zara, a belief that ‘aliens’ created life, or (optimally…) a belief in God.
The Eastern religions are so dangerous to Jews because they combine a hefty dose of bio-physics with a heftier dose of spiritual impurity and avoda zara that takes people away from God, and leads them to embracing general ideas of ‘the universe’, and spirituality-without-God instead.
Yoga is rooted in spiritual impurity, that’s why it’s so dangerous at the spiritual level, for all of its ‘bio-physical’ aspect. (When people start doing yoga, they don’t go on about the physical benefits, they go on (and on…and on…) about its ethos and philosophy - that’s what makes it a spiritual practice.
Chinese medicine and energy meridians are rooted in bio-physics, which is why they don’t pose the same spiritual problems for Jews. The same is true of crystals (which work with the human body along the bio-electric lines referred to above), the same is true of eating raw food, the same is true with other meridian-based practices like tapping (EFT), acupuncture and acupressure, for example.
Sadly, as bio-physics leads to an awareness that there is more to human beings and health than just being a piece of animated meat, it’s much easier to get caught up in avoda zara and Eastern religions as a result, which is what’s happening in the Jewish community.
The amount of ignorance about how human health actually works, and how dangerous avoda zara really is, is astounding. I also strongly feel that it’s the work of believing Jews to start connecting bio-physics firmly back to God and the Torah - but it’s going to be a huge job.
I've written a bunch of stuff about why yoga is problematic halachically on my site at www.emunaroma.com - search for 'yoga', including this psak from Rav Ginsburgh:
And I've also written a bunch of stuff about the bio-physical aspect to human health on www.spiritualselfhelp.org - search for 'electromagnetism'.