

PewDiePie later said on Twitter he was "absolutely sickened having my name uttered by this person" PewDiePie has been embroiled in a race row before, so some have speculated that the attacker knew that mentioning him would provoke a reaction online.

Before opening fire he shouted "subscribe to PewDiePie", a reference to a meme about keeping YouTube star PewDiePie as the most-subscribed-to channel on the platform.

About 10 to 20 minutes before the attack in New Zealand, someone posted on the /pol/section of 8chan, a message board popular with the alt-right.Others, including news media, distributed the photo as a way to document the attack, he added. Within the first 24 hours of the attack, Facebook blocked 1.2 million uploads of the video, but said that its efforts were thwarted partly by "bad actors" who coordinated efforts to post the video. "As a learning from this, we are re-examining our reporting logic and experiences for both live and recently live videos in order to expand the categories that would get to accelerated review." "In this report, and a number of subsequent reports, the video was reported for reasons other than suicide and as such it was handled according to different procedures," he noted. He noted that Facebook accelerates a review if a video is flagged for suicide, which he said the livestream wasn't flagged for. The first report came in 12 minutes after the video ended. The video was viewed about 4,000 times before Facebook blocked it from the service, he added.

"This matters because reports we get while a video is broadcasting live are prioritized for accelerated review." During the live broadcast, the service "did not get a single user report," he wrote. While the attack was live-streamed, the video was viewed fewer than 200 times, Rosen said.
