I'm the mother to an amazing, beautiful, sweet, intelligent, funny, silly, challenging autistic daughter.
First off, it's not unusual for there to still be chauvinistic attitudes among assholes.
Secondly, the entire Refrigerator Mom Theory when it came to mothers and their offspring (the idea that mental illness, neurological disorders, behavioral disorders, personality disorders are caused by an emotionally "cold" mother) went out the window and was debunked decades ago.
Thirdly, it's far too early to call Nancy Lanza a wacko. No one in the public knows enough information to make the sort of judgment.
I'm not going to click that link. I don't feel like rolling my eyes any harder than I already have today. It's given me a headache.