-- Evangelicals doubt man-made global warming,
-- Evangelicals believe that gays can "pray away" their homosexuality.
-- Evangelicals believe Earth is only thousands of years old and that men lived alongside dinosaurs.
-- Evangelicals oppose same-sex marriage.
Given how often they are made, it's worth analyzing these charges.
With regard to man-made global warming, the accusation that all skeptics are anti-science is despicable and, indeed, anti-science. The list of prominent scientists who dissent -- including the scientist widely considered the dean of climate science in America, Richard Lindzen of the Massachusetts Institute of Technology -- is so long that there are entire websites that feature their names and credentials: There's a Wikipedia page titled "List of Scientists opposing the mainstreat scientific assessment of global warming" and a website called PetitionProject.org.
The authors of the Times op-ed piece, like virtually all other left-wing intellectuals who comment on the subject, dismiss all skepticism regarding the Al Gore hypothesis that humanity is headed toward a worldwide apocalypse due to heat resulting from man-made carbon emissions. This is a reflection on these intellectuals' politics, not on their commitment to science.
With regard to "praying away" homosexuality -- if it is indeed the normative evangelical position that all gays, with the right faith, can cease being sexually attracted to the same sex -- that position is wrong. But to the best of my knowledge, that is not the normative evangelical position; evangelicals believe that no more than they believe that prayer alone will end any undesired physical condition.
At the same time, the opposite position -- the position of nearly all the liberal intellectual world -- that everyone's sexual orientation is fixed is a position also driven by ideology rather than by science. Society has a huge influence on how people act out their sexuality, including the gender of person with whom they choose to be sexual. Human sexuality -- especially female -- is far more elastic than the intellectual community admits. And the widespread liberal belief that, all things being equal, it makes no difference whether a child is raised by a mother and father or by two fathers or two mothers is hardly rational. On the issue of homosexuality, the intellectual left is just as driven by ideology as evangelicals.