That doesn't mean it's only useful to static apnea champions, though. The potential uses are wide-ranging, perhaps stress control and introspection is what most people can get from it.
There copious amounts of solid empirical evidence on the effects of meditation.
On the other hand, it has been proven that taking breaks can enhance concentration and endurance. Meditation should be no exception.
Anyway, these people aren't really practicing eastern religions. They're simply remaining ignorant enough about the faiths that their PC sensibilities aren't triggered.
I'm curious about your connection of self-hatred to 'the social dynamics of this meditation stuff.' Could you expand on what you wrote?
Prayer is communication with a God(1), while meditation is simply quieting of the mind(2).
Therefore, one is not a warped form of the other. The two are distinct.
Finally, meditation is a etymologically a western term(3)
(1) http://www.merriam-webster.com/dictionary/prayer (2) http://www.merriam-webster.com/dictionary/meditation (3) http://www.etymonline.com/index.php?term=meditation