More liberal “logic”.
If a person who ran his car into a crowd and murdered some, would we later fret that because this person had been “allowed” to “amass” a garage full of cars that he was surely a dangerous person?
In this case, the mass murder was possible because this man had been allowed to amass (notice the pejoratives) over a dozen firearms? How can the quantity of firearms in the closet imply anything with respect to wanting to murder or not murder? It appears that he only chose to carry four of them to the college. It remains to be seen how many were actually used.
This is clearly another case of the failure of the law against murder to work. Liberals just cannot accept that government has limited ability to control human nature.
Liberal logic states that prisons should be the safest places on earth.