It's not so much here that religion itself is so overabundant that it forces its views on people (although there is plenty of that), it's more that our traditions, laws, values, and culture all were built from people who were religious (specifically judeochristianity, specifically protestantism). Even those who are raised without specific religious views gain the tradition and culture of a religious society.

While we're far from theocracy, the churches still have quite a pull :)