How about a simple, stupid fucking accident, hm?
People, you can't even call it "murder" at this fucking point and you GODDAMN RETARDS are blaming all sorts of people on it for no reason than you're idiots.
It's not a joking matter. If you're joking, you're not funny, you're assholes. Grow up.
I'm assuming he's talking about the criminal actions in Boston. There's enough evidence there that it was an explosive device rather than a gas main or similar, thus the deaths in boston are murders.
Now I never really understood the finer points of english, however I agree with the OPs sentiment, terrorism is "to do something to instill terror". It's not a verb, it's an adverb.
"The washington sniper was a terrorist. His murders were clearly terrorism."
Washington sniper -- noun
terrorist -- adjective
murders -- verb
terrorism -- adverb
"The 9/11 terrorists flew a plane into the building as an act of terrorism."
hijackers (hidden word after 9/11) -- noun
terrorists -- adjective
flew a plane into the building -- verb
act of terrorism -- adverb
"The TSA goons gropes small children to instill fear and obedience, which itself is terrorism"
TSA goons -- noun
grope small children -- verb
instill fear and obedience -- verb
terrorism (adverb, linking to first verb)