There's a difference between being dense and being pragmatic. Yes, there most certainly are people that do horrible, awful things like our good friend "cuba" in the above post. As I stated above:

And that's entirely possible. But, there's an equal chance that it's not a joke, and this guy is severely fucked up. Just because you can't understand why a person would commit such an atrocity doesn't mean that it doesn't happen. I don't understand what compelled Adolf Hitler to order a campaign of mass genocide, but that doesn't mean that it didn't happen. Pull your head out of your ass.