Actually the devotional sect of Hinduism, the Bhakti movement, has been engaging in this very type of communal ecstatic activity since the late middle ages. The Sufi mystical branch of Islam also has the practice of Dhikr which is similar. Tibetan and other Mahayana Buddhist sects create elaborate mandalas to use along with chanting and other sound sensory overload to induce altered states of consciousness and experience what they term the "Buddha Lands."
having passed through many states of believing I was right I have come to the place of finding "rightness" rather irrelevant to the project of becoming human
