Eh? My point is, say he was a disgruntled ex-employee of the venue who just snapped (like that shooter at the autistic school(?)), then it wouldn't be "terrorism", would it? Whereas if he did it as a calculated attack to further an ideology of some sort, then yes I would agree Terrorist is the...
Because we don't know what the political motive (if any) of the shooting is, perhaps? If someone shouts something political whilst shooting people, it's pretty obvious what the motive is.