The primary reason to be appalled: The government has no business pressuring a website to take down this video.
A secondary reason: They're probably barking up the wrong tree anyway. There's a strong possibility that the video was just a pretext for the attacks, much as it pains the administration to admit it.
A tertiary reason: Remember how tech-savvy this White House was supposed to be? And now they think they can choke this off at the source?