If I'm not mistaken, the image comes from the author's own video of the murderous assault. The post is about the author being demonized for having published it

If I'm not mistaken, the image comes from the author's own video of the murderous assault. The post is about the author being demonized for having published it and the contrivance of conspiracy theories and threats against him and his family. It connects these events to "fake news" by first hand experience dangers of muddying the informational waters around controversial and important issues.