Al, you are very much mistaken in your assumption that fundamentalist Christians constitute a majority in the USA. Christians, yes...nominally...but definitely not fundamentalist Christians. I would guess that the fundamentalist you are imagining when you use that word make up, oh, about 20% to 30% of the population at most. (and they do tend to vote solidly Republican, so that makes them a key voting bloc)

BUT....

The ruling religion of the USA is consumerism, not fundamentalist Christianity (and it rules most so-called fundamentalist Christians too!). The ruling church is Wal-Mart. The ruling ethic is conspicuous consumption. The result is collosal ignorance, laziness, boredom, wasted lives, and dozy, confused people who are easily manipulated by TV into supporting their corrupt government because they are too mentally comatose to know any better.

Worry about that if you want to worry about something. It's a far bigger factor than fundamentalism.

The USA is the nation that sold its soul for material conveniences.