I could comment on the specifics of today's shooting at the National Holocaust Museum or even on the background of the accused shooter.
Instead, I'll let Shepard Smith read "a representative e-mail":
This was an important and needed thing he did today. More like it needs to be done.
UPDATE: Putting the moron in "oxymoron": Via hilzoy, here's a snippet from this Washington Post article about the shooter:
[Self-described white-supremacist John] De Nugent called von Brunn a genius but described the shooting as the act of "a loner and a hothead."
"The responsible white separatist community condemns this," he said. "It makes us look bad."