If it was terror related, the issue becomes of path to extremism, which is what needs to be extinguished. And access to assault weapons. If workplace related violence, it becomes more of an issue of mental health and access to assault weapons.
They went and killed a bunch of the guy's co-workers but the crazy and stupid reason that they had for doing so was shared by a bunch of other crazy and stupid people as opposed to being their own issue.
If it happened in any other country it would be a fairly unique thing, but in America it kind of seems like par for the course.
And NRA nuts are bouncing around yelling that this wouldn't have happened if the place wasn't a gun free zone. They are just stopping short of saying we need compulsory gun possession in this country.
Turns out unfettered access to serious firearms was a bad idea... and now that they've been shown to be wrong, they think the solution is more gun ownership and prevalence in society.