Chris Harper Mercer's Facebook Page, Before and After Official NSA Purging?

Before

After

I can't vouch for this.

An Anonymous commenter gives us food for thought:

I am absolutely convinced that the regime makes a conscious effort to hide or distort a shooter's on-line history to conform to narrative as much as possible. This is why DHS immediately takes over the scene and withholds the shooters identity. 

I am also certain that there is a designated task force in DHS/NSA dedicated to rapid response to such situations and that Obama's remarks have been written beforehand waiting for an occurrence. 

It is not too much of a stretch to imagine that their are DHS operators who actively seek out disturbed individuals identified by NSA data mining and encourage them to act out violent fantasies. 

How do we know that the people posting encouragement to the deranged posters are not government agents? 

These assholes are trying to start a Civil War. The ultimate crisis (and they won't let it go to waste.)

Coincidence? Alek Skarlatos, American Hero Who Helped Put Down Jihadist on French Train, Was Raised in Roseburg, Oregon, Home of Umpqua Community College

The home of Umpqua Community College also happens to be the hometown of Alek Skarlatos

From Wiki:

Skarlatos (centered), standing with President of France François Hollande (left) and United States Ambassador to France Jane D. Hartley.
Born	October 10, 1992 (age 22)
Residence	Roseburg, Oregon, United States
Nationality	American
Television	Dancing with the Stars
Awards	Knight of the Legion of Honour,United States Army Soldier's Medal

Oregon Gunman Asked About Religion, Then Purposefully Shot ID'd Christians In The Head?

From BNO News:

The gunman who opened fire at Umpqua Community College in Oregon asked victims to state their religion before opening fire, according to multiple reports. An 18-year-old student told the News-Review newspaper that the gunman, after shooting her teacher in the head through a window, told people to get on the ground. He then told people to stand up and state their religion before opening fire. 

Twitter user @BodhiLooney, who said her grandma was at the school, said the shooter asked people if they were Christian. “If they said yes, then they were shot in the head,” she wrote. 

“If they said no, or didn’t answer, they were shot in the legs.”