[Salvation]

Because Christians are Hindus focusing on a false god.

[sphinx]

I have never done yoga and have no interest in it. Over the years, I have known a few people who have tried it. None of them have considered themselves to be worshipping anything. Their focus has been on the physical discipline coupled with meditation/relaxation and mental focus.

Yes, I gather from news reports that a few Westerners will go further and delve into Hindu "spirituality," in various guises. Some of these may in fact take yoga as a point of entry into a different religion. But my guess is that these are a very small fraction of the people in the U.S. who "do yoga."