Killer Distinction

When the guy who runs the country, David Axelrod, discussed moving the terror trials out of New York yesterday, he went out of his way to make sure we knew that Khalid Sheikh Mohammed is a murderer, not a terrorist. Why does this distinction please liberals so?
Axelrod justifies being wrong on trying terrorists in this country by saying George W. Bush did the same thing. Ironic to see them protect themselves by standing under the cloak of W., who they consider to be the worst president in history.