Not only is TM a part of the eternal Religion of the Vedas (Sanatana Dharma) but is only, I repeat, only ONE limb (dhyana) of Patanjali's *eight* limbs of Yoga. The fact that TM is *marketed* as not being a Religion is one thing, (MMY said you can teach TM in whatever form you wish), but to deny it is Religious is ridiculous!
Religion=to bind back (to God/Self). TM as a simple mental technique is MMY's effort to reach out to ignorant humanity and let them *begin* to experience the simplest form of their own awareness. When ALL eight limbs of Patanjali's Yoga are practiced *simultaneously* one can be said to be truly practicing Yoga in earnest. (MMY's Gita page 363 HB) Unless you want to hobble along on one wheel......you'll still get there, it'll just take longer!