Varieties of criticism
Conservative criticism has nothing much to do with "left-wing" or "right-wing", because left-wing people are often very conservative, in the defined sense, while right-wing people can also be very radical, in the defined sense. The difference between "radical" and "conservative" has more to do with the belief in whether "a change to something genuinely new" is really possible and necessary. Radicals typically believe strongly that such change is highly desirable and necessary, and that it can be achieved. Their criticism is that there is "not enough" change. Conservative critics, by contrast, are very skeptical about any such change, because they feel the change is really "just another form" of something that already exists.
Alt-right
, the scope of the term "alt-right" is still in flux. The Associated Press advises its journalists to not use the term without providing an internal definition, due to its vagueness. The Anti-Defamation League states that "alt-right" is a "vague term actually encompass[ing] a range of people on the extreme right who reject mainstream conservatism in favor of forms of conservatism that embrace implicit or explicit racism or white supremacy". Conservative writer Ben Shapiro claims that the American Left has attempted "to lump in the Right with the alt-right by accepting a broader, false definition of the alt-right that could include traditional conservatism", but other conservatives have advocated for a broader definition. For instance, Allum Bokhari and Milo Yiannopoulos of "Breitbart News" described the alt-right in March 2016 as "an amorphous movement ... some—mostly Establishment types—insist it's little more than a vehicle for the worst dregs of human society: anti-Semites, white supremacists, and other members of the Stormfront set". On the other hand, the Southern Poverty Law Center states that "[t]he Alt-Right is intimately connected [to] American Identitarianism, a version of an ideology popular in Europe that emphasizes cultural and racial homogeneity within different countries" and also notes that multiple alt-right leaders, including Richard B. Spencer, embrace explicit antisemitism.