What is a twenty year old doing

[bhikkhu]

15. The easier it is for "future time bombs" to acquire arsenals

the more damage they can do, and probably the more likely it is that they "go off".

I'd argue that the lack of effective gun regulations and the derision directed at any effort toward responsible regulation of weaponry makes it easier for one to plan an act of violence. It also makes it easier to imagine that being a "gun nut" is somehow an accepted role for one in society.