Speaking of selective moral outrage, you can also see it in the media's hype of Ann Coulter's comment. Martin Bashir set the whole thing off by making his own controversial comment which the media doesn't find controversial.
“But Congressman, is that what needs to happen to move these senators to stop threatening a filibuster?” Bashir asked. “Is that really what needs to happen? That you need to have a member of your family killed in order for you to do what the American people want you to do?”
Since more are killed by drunken drivers each year than are murdered by guns, perhaps what we need are people to have their family members killed by drunken drivers?