To the author: Yes, it is different than murder. Murder is when one person kills another knowingly and maliciously. Bullying and harassment, no matter how disgusting, is not murder. Close, yes, perhaps, but still undeserving of the hyperbole.
This is not to say those harassing and bullying (if that did happen; I have not looked into the author's claims, nor do I follow the BSNES/Higan community) should not be held to account.
As a culture, we must fight against this tide of hyperbole in every argument and every disagreement. It leads to one thing and one thing only: violence. We don't need to fracture society further by casting everyone who does bad things as a "terrorist." There are spectrums of crime and punishment; it's not binary.