Sorry it really isn't. Yoga is its true sense is an individual practice for improving one's mental, physical, spiritual state of being. Perhaps if you are a practitioner of Yoga, you might be interested in learning more about its origins and history [1].
Bikram Yoga which the author took classes for is a commercial take on yoga, much like Dance Yoga, Jillian Michaels Meltdown Yoga; or something I could copyright tomorrow called "Dance Dance Yoga Revolution". From my understanding Bikram Yoga is a fitness product to make money for its founder, which he has ensured by "copyrighting" his system of poses and by suing numerous studios and former students, etc. Maybe this is why the author's experience with yoga was of being judged and why he calls anyone with an opposing view a "hippie". The practice of saying "namaste" at the end of the session sounds like something you'd do to add a flavor of east meets west to make this practice cool/hip because in the context described in the article, it doesn't add much to the state of the individual aside from this cool "namaste moment."
"Choudhury holds a copyright for the 26 poses which constitute Bikram yoga under the same theory which allows choreographic sequences to be copyrighted. In September, 2011, Choudhury filed an infringement suit against his former student, Greg Gumucio, founder of a competing chain of hot yoga studios."
Disclaimer: I haven't ever taken a Bikram Yoga class, but I've been practicing Yoga on and off since high school.