For decades, liberals have called the Christian right intolerant. When conservatives disengage from organized religion, however, they don’t become more tolerant. They become intolerant in different ways. Research shows that evangelicals who don’t regularly attend church are less hostile to gay people than those who do. But they’re more hostile to African Americans, Latinos, and Muslims. In 2008, the University of Iowa’s Benjamin Knoll noted that among Catholics, mainline Protestants, and born-again Protestants, the less you attended church, the more anti-immigration you were. (This may be true in Europe as well. A recent thesis at Sweden’s Uppsala University, by an undergraduate named Ludvig Broomé, compared supporters of the far-right Swedish Democrats with people who voted for mainstream candidates. The former were less likely to attend church, or belong to any other community organization.)
That is from Peter Beinart, more of interest at the link.