A Private Eye wrote:

I think to say nothing can be done is ridiculous, even if it's just baby steps. Obama I believe (one of you may know the details better than me) passed a bill making it much harder for people with mental illnesses to buy guns. The fact that wasn't already a law is scary enough but it is evidence that something constructive could be done. Trump has since revoked it.

If someone is hell bent on committing something like this then yes it is difficult to stop completely but surely making them harder to achieve would be progress, no? 

I realise I come from the UK so I do admittedly find the US's gun fetish a bit baffling but how anyone can argue the need for assault rifles at home is beyond me. The train of thought that outlawing a weapon that can injure and kill 600 people in 10 minutes in the middle of one of the most iconic streets in the world is somehow violating them of their rights I find staggering.

This is the problem. Misinformation. This is exactly what the video I posted talked about. Obama didn’t do anything. His EO applied to people on government disability for mental defects that needed a 3rd party to manage their affairs.

The ACLU sued him, and before it got to the courts Trump stopped it. But Obama didn’t do anything about mental illness. He’s the guy that changed the law so we have to call the mentally ill by their preferred pronoun remember?

I won't.  I'm all for tighter background checks and expanding them.  I'm not going to ban a weapon because 10 citizens out of 90 million used them for carnage.