I guess journalists feel the need to say something sensational. If anyone read the report on the survey (which few Americans will), one would discover that the headline of
The Atlantic article doesn't accurately characterize the survey questions or findings. The following reports the findings relevant to the headline:
White Christian groups hold significantly different opinions than all other religious groups about reverse discrimination. More than six in ten white evangelical Protestants (68%), white mainline Protestants (63%), and white Catholics (62%) say discrimination against whites is now as critical as discrimination against non-whites. In contrast, more than six in ten religiously unaffiliated Americans (67%), black Protestants (66%), and Hispanic Catholics (61%) say discrimination against whites is not as big a problem as discrimination against blacks and other minorities in the U.S.
Perceptions of Discrimination Against Christians
Nearly half (49%) of Americans also say discrimination against Christians has become as big a problem in America today as discrimination against other groups, while half (50%) of Americans disagree. Although there are no significant differences in opinion by race or ethnicity, among white Americans, anxiety about discrimination against Christians varies substantially by social class. More than six in ten (62%) white working-class Americans believe discrimination against Christians is now as big a problem as discrimination against other groups. Only 38% of white college-educated Americans agree, while 62% disagree.
[. . .]
Christians are considerably more likely than non-Christians to perceive significant discrimination against Christians in the U.S., yet there is still significant diversity of opinion among denominations. Nearly eight in ten (77%) white evangelical Protestants say that discrimination against Christians now rivals that of other groups. Substantially fewer white mainline Protestants (54%), white Catholics (53%), black Protestants (53%), and Hispanic Catholics (50% agree that discrimination against Christians is now as big a problem as discrimination against other groups in the America. About eight in ten religiously unaffiliated Americans (78%) and adherents of non-Christian religions (77%) disagree.
http://www.prri.org/wp-content/uploads/2016/06/PRRI-Brookings-2016-Immigration-survey-report.pdf
So, of the 62% of "white working-class Americans" who "believe discrimination against Christians is now as big a problem as discrimination against other groups," how "big a problem" do they believe discrimination against other groups is? Probably not very big. Therefore, their belief of discrimination against Christians is apparently not perceived as any larger problem than that.
Anyway, I thought the more interesting findings were those showing the general disapproval of Trump's proposal on building a wall at the border with Mexico and his discriminatory immigration proposal.