"Religious Nones" Now Leading Religion Group in US

This is an amazing graph: those who say they follow no religion are now the leading "religious group" in the US.


My guesses for the reasons behind this trend:

1. the freedom from social norms unleashed in the '60s.
2. more education over the decades.
3. Catholic sex abuse scandals.
4. Overly political, hypocritical behavior of Christian evangelicals.
5. Richard Dawkins, Sam Harris, Christopher Hitchens, etc.
6. Longer working hours = less time for traditional social activities such as church, mass or synagogue.
7. Internet offers a sense of community and connection to the atheists and agnostics.

Anything else?

Now, when will politicians start catering to the Religious Nones in the same way they cater to Christians?