illegal border-jumpers these days, who are by an overwhelming percentage “military-age men”
An outright lie. According to the Center for Migration Studies 3/23/2022:
Women and girls make up 46 percent of the total US undocumented population.
https://cmsny.org/undocumented-women-032322/
As for "the conspicuous number of rapes committed" by illegal immigrants, the majority of statistics show that illegal immigrants avoid commiting crimes for fear of being deported.
Regarding Kunstler's remarks concerning "batshit crazy women" and American men as eunuchs, it seems that he has some significant neuroses regarding sex. He's certainly frightened of strong women, as per his characterization of Trump as
the archetypal “Big Daddy” who so insolently evaded the castration shears of Hillary Clinton