So he made a (controversial) argument about leftists which actually fits in with his broader point that humans these days are not able to self actualize and therefore suffer from repressed feelings. IMO the statement he made is significantly less crazy than Freud's "scientific" theory of penis envy (https://en.wikipedia.org/wiki/Penis_envy#Freud.27s_theory), which was treated as an actual theory by the scientific community for _decades_.
It's a bit polemic about leftists in that regard, but do you think the overall point is invalid? If so, maybe argue why instead of just calling him crazy.