Seriously? Good luck getting a mentally ill person to kill 27 people and himself in less than a half hour with a bow and arrow. Talk about missing the point.
Because explosives don’t exist? Because no one can kill multiple people with a sword? Have you ever shot a gun? Have you ever shot at a moving object? It’s not that easy to hit stationary targets let alone moving targets. Is it easier to kill with a gun as opposed to a sword? Yes. Is it any less lethal? No. By my count, one lost life is no less tragic than 100 lost lives.
In the Middle East, multiple lives and sometimes dozens of lives are taken in an instant using IEDs (improvised explosive devices) built from nothing more than pipes, metal scraps and explosive chemicals.
The Oklahoma bombing was conducted using cow shit.
Also remember this, 8 men armed with nothing but box cutters put 4 planes into 3 buildings, killing over 3,000 people on 9/11/2001.
So, no, you don’t need a gun to take multiple lives in quick succession.