Alexander Dugin is right-wing and religious—and a disciple of Heidegger‘s.
Michael Foucault is left-wing and atheist—and a disciple of Heidegger‘s.
Dugin on the philosopher who accomplished “the most all-encompassing, paradoxical, profound, and penetrating study of Being. I am talking about Martin Heidegger.” (Source: The Fourth Political Theory, 2009)
Foucault: “Heidegger has always been for me the essential philosopher.” (Source: Foucault Live (Interviews, 1961-1984)
Let’s focus on the philosophical roots of illiberalism, not just the varying symptoms.
For more: my coverage of Heidegger, Foucault, and Dugin in the Philosophers, Explained series: