In Australia at least 16, aged 10-87, were killed and some 40 were wounded at a "Chanukah by the Sea" celebration. Yes, the victims were largely Jews, and amazingly, the police think [admit] it was terrorism.  

In this case, the two killers were apparently not "known wolves."

Naveed Akram, 24, and his 50-year-old father, Sajid, allegedly stormed the family-friendly Chanukah by the Sea event armed with shotguns and a bolt-action rifle…

Akram was disarmed by a bystander and eventually critically wounded by police during the 20-minute attack, while Sajid was killed.

At Brown University, during final exams, a man dressed in black entered a lecture hall,  "yelled something" and opened fire, apparently with a handgun. Two were killed and nine were wounded.  A "person of interest" was detained but was apparently released and the actual killer remains at large. As this is written, there is no apparent motive.

What both attacks have in common is that once they began, the victims were sitting ducks. Gun laws and regulations assured the killers their victims would be unarmed.

Australia doesn't absolutely ban private ownership of guns, but is an anti-liberty/gun paradise that recognizes no right to self-defense. Citizens may own a narrow range of guns, but restrictions are sufficient to make Australia the envy of American gun grabbers. The entire nation is essentially a gun-free zone. With nearly all of what anti-liberty/gun cracktivists say is necessary to ensure absolute public safety, the Bondi Beach massacre should not have been possible. The Premier of New South Wales, therefore, wants even more gun control: