It's definitely irrational, although "stupid"? Not sure. I've seen fairly intelligent people falling victims to such delusions. Kid is born. You rejoice. Kid d

It's definitely irrational, although "stupid"? Not sure. I've seen fairly intelligent people falling victims to such delusions. Kid is born. You rejoice. Kid develops autism. You're devastated. Doc tells you it might be genetic, partially. The rational part of your brain goes "genes, mutations, alleles, etc". The irrational part of your brain goes "you mean my man-juice was bad and spoiled? how dare you? I am a real man and I'll see you in hell!" So at that point it depends on which part of your brain wins. Is it the part that gave us Einstein or Plato? Or is it the part that we're sharing with pigs and jackals? I think this model explains a lot of completely irrational things bouncing around the world these days.