On Heidegger’s Nazism and Philosophy |  by Tom Rockmore | University of California Press, 1992

“I appeal to the philosophers of all countries to unite and never again mention Heidegger or talk to another philosopher who defends Heidegger. This man was a devil.” – Sir Karl Popper

“What Heidegger did was to give philosophical seriousness, professorial respectability, to the love affair with unreason and death that dominated so many Germans in this hard time… And Heidegger’s life — his isolation, his peasant-like appearance, his deliberate provincialism, his hatred of the city — seemed to confirm his philosophy, which was a disdainful rejection of modern urban rationalist civilization, an eruptive nihilism.”

http://www.friesian.com/rockmore.htm

https://en.m.wikipedia.org/wiki/Martin_Heidegger_and_Nazism