Two related articles:
It Turns Out That a Less-Christian America Might Be a Worse America
Months ago Ross Douthat wrote a prescient piece arguing that if the Left disliked the religious right, it will positively loathe the post-religious right. In other words, the absence of religion does not necessarily or even likely lead to the growth of tolerance and moderation.
As Religious Influence Ebbs in America, Incivility Increases
The Right embraces populist nationalism, the Left embraces identity politics.