Chris might talk big, but he's not a killer. The only way he'd kill anyone is by accident. He might try to take a swing, but ultimately he'd fall well short of doing anything that would cause any big harm.
Lemme spell it out to you: For all of his problems, Chris is not Hitler. He's not a serial killer either. Hell, for all the jokes, Chris isn't a mother fucker (in the literal sense) either. He's just a sad, stupid, lonely man who made stupid choices when it came to being online and because of how overprotective his family is/was, he assumed that the world would bow to his wants and needs. And was then surprised when it didn't, yet still continued to make the same mistakes because he refused to acknowledge that reality. He's not a monster, not in the sense that most of us would truly call a monster. He's just pathetic, is all.