According to
Nature, "Critics of new atheism, as well as many new atheists themselves, contend that in philosophical terms it differs little from earlier historical forms of atheist thought."
General criticism and scientism Critics of the movement described it as "
militant atheism", "
fundamentalist atheism", and "
secular fundamentalists". Theologians Jeffrey Robbins and Christopher Rodkey take issue with what they regard as "the
evangelical nature of the New Atheism, which assumes that it has a Good News to share, at all cost, for the ultimate future of humanity by the conversion of as many people as possible", and believe they have found similarities between New Atheism and evangelical Christianity and conclude that the all-consuming nature of both "encourages endless conflict without progress" between both extremities.
Amarnath Amarasingam, an extremism researcher, argues that the New Atheists fall prey to cognitive biases such as the
fundamental attribution error and the
out-group homogeneity bias, among others. These biases pose a substantive problem for New Atheism’s claims to rationality and objectivity. Political philosopher
John Gray asserts that New Atheism,
humanism, and
scientism are extensions of religion, particularly Christianity. Anthropologist and psychiatrist
Simon Dein considers New Atheism to be a mirror image of religious fundamentalism, based on an analysis of characteristics identified by the
Fundamentalism Project: reactivity, dualism, absolutism and inerrancy, and apocalypticism. In addition, he also notes a shared emphasis on evidentialism. Sociologist William Stahl has said, "What is striking about the current debate is the frequency with which the New Atheists are portrayed as mirror images of religious
fundamentalists." The philosopher of science
Michael Ruse states that Richard Dawkins would fail "introductory" courses on the study of "
philosophy or
religion" (such as courses on the
philosophy of religion), courses which are offered, for example, at many educational institutions such as colleges and universities around the world. Ruse also says that the movement of New Atheism—which is perceived by him to be "a bloody disaster"—makes him ashamed, as a professional philosopher of science, to be among those holding to an atheist position, particularly as New Atheism, as he sees it, does science a "grave disservice" and does a "disservice to scholarship" at a more general level. In
The Evolution of Atheism, Stephen LeDrew wrote that New Atheism is fundamentalist and scientist; in contrast to atheism's tradition of
social justice, it is
right-wing and serves to defend "the position of the white middle-class western male". Professor
Jacques Berlinerblau has criticised the new atheists' mocking of religion as being inimical to their goals and claims that they have not achieved anything politically.
Roger Scruton has extensively criticized New Atheism on various occasions, generally on the grounds that they do not consider the social effects and impacts of religion in enough detail. He has said, "Look at the facts in the round and it seems likely that humans without a sense of the sacred would have died out long ago. For that same reason, the hope of the new atheists for a world without religion is probably as vain as the hope for a society without aggression or a world without death." He has also complained of the new atheists' idea that they must "set people free from religion", calling it "naive" because they "never consider that they might be taking something away from people".
Edward Feser has critiqued the new atheists' responses to arguments for the existence of God:
Sexism There have been criticisms of such movements perpetuating
patriarchal beliefs and practices such as
sexism, despite internal claims of
gender equality. This has contributed to female atheists feeling shut out, trivialized, and silenced. The New Atheist movement was accused of sexism after "
Elevatorgate", a controversy surrounding atheist blogger
Rebecca Watson's criticism of unwanted sexual advances in the atheist community. In 2014, Sam Harris said that New Atheism was "to some degree intrinsically male". Wade Jacoby and Hakan Yavuz assert that "a group of 'new atheists' such as Richard Dawkins, Sam Harris, and Christopher Hitchens" have "invoked Samuel Huntington's 'clash of civilizations' theory to explain the current political contestation" and that this forms part of a trend toward "Islamophobia... in the study of Muslim societies". The same year,
Scott Alexander, a blogger in the ideologically similar
rationalist community, countered that New Atheism declined because it "seamlessly merged into the modern social justice movement", with many former New Atheists becoming more interested in fighting
sexism,
racism, and
homophobia under the label "atheism-plus", leaving only
right-wing atheists remaining in the original movement. In a June 2021 retrospective article,
Émile P. Torres of
Salon argued that prominent figures in the New Atheist movement had aligned themselves with the
far-right. == Reception and legacy ==