I could be totally off and/or missing important details, but weeb YouTuber ChibiReviews (the guy in the Snarky Snappy clip) got into some heated drama earlier this week that allegedly involved him getting doxed and threatened on Twitter by other weebs. He posted a video to YouTube talking about the drama and showed off his gun as a warning to anyone who wanted to show up to his house.
Someone from snarky saw gem potential and made a /raid/ thread on ChibiReviews to fan the flames, which very quickly resulted in someone from the thread hacking Chibi's DeviantArt to replace the pfp with the sharty's "nothing is beyond our reach" image. Soyteens in the thread also claimed to find provocative images of real children in his favorites, but Chibi claimed on Twitter that those were added by the hacker (idk how to prove this one way or the other). That's pretty much all I've gathered from some brief discussion on Twitter.