Most people talk about Religions people being fanaticists with a disregard for human wellbeing. (Outside of their religion) I associate this with the sects that emigrated to America due to prosecution in Europe and American New religons. (Amish, those Utah people etc., those wierd evangelicals(?))
Of course there are also good religious groups in America.
Yes, but they are not gaming devices. They are meant to efficiently compute things. When used for that purpose they use little energy compared to other devices doing the same thing.