Sure, there have been those unable to grasp this fact:they are still unable to grasp it. This is the kind of thing that led a friend of mine to say, "Let's elect a democratic president next time, and see whether reality strikes." It's a strategy.
Most of these people are engaging in "displacement" -- attacking a scapegoat they can reach rather than acknowledge that the threat to them comes from elsewhere. George Bush, Mexican immigrants, Christianists -- these are all threats to people who don't want to admit that they are the minor, everyday noise of the nation, not people with guns who want to kill us. It's an amusing strategy, but not worth paying attention to.