I would suspect that some of these were said jokingly or absentmindedly, but then I've met a few people who are capable of all this and more. I don't usually like putting cognitive processes labels on things, especially things like this, but these people often have some form of extraverted thinking.
I was visiting my brother's church and his boss/pastor was teaching about Islam or something along those lines and he said:
"Not all Muslims are terrorists, but all terrorists are Muslim." Totally with a straight face.
Okay, so that would be bad enough, but we live in the town where they executed Tim McVeigh.
And this guy is not even actually stupid, just apparently very willfully ignorant.
“There are two novels that can change a bookish fourteen-year old’s life: The Lord of the Rings and Atlas Shrugged. One is a childish fantasy that often engenders a lifelong obsession with its unbelievable heroes, leading to an emotionally stunted, socially crippled adulthood, unable to deal with the real world. The other, of course, involves orcs.” ~ John Rogers