It's not a legitimate question as I've already said I've taken yoga classes.
I never said it was a "sneak attack." I said it is the practice of a form of spiritualism I don't want to participate in.
There is nothing false about saying yoga is a branch of hinduism and incorporates hindu spiritualism into the practice.
You're not a yoga authority (as far as I know) and not the arbiter of what does and does not take place in a yoga class or what should or should not.
Honestly, it sounds to be like you are experiencing some religious dissonance and it's making you uncomfortable.
(Maybe some TM will help you work through it?)