The guy thinks that a murdered guy deserves to be sung about how his being murdered is his fault. Which even if it is doesn't make the insults to his death right. Why is he making these insults? Because a news article linked to his YT channel, he shut it down because he didn't want employers asking why he's linked to a "murderous" game. Because it's totally impossible to make it clear to any halfway reasonable employer that they shouldn't worry, the guy did NOTHING that could have contributed to the murder.
And people like WaddlerD refuse to care? What the Link? (Blame TwitchTV for that, by the way...)