It does nothing to those barriers. They are still absolutely the same. Unless you're trying to argue that somehow guns magically imbue in people the intent to kill.
I assure you, they do not. In point of fact, the hobby can get rather onerous to upkeep due to maintenance costs and the burden of magical thinking individuals like yourself employ, necessitating constant vigilance and correction.
People kill people.
AI, gun, explosive, makes no difference. Long as there are two blokes atound with irreconcilable opinions/worldviews, somebody's gonna want someone else dead. And that is the problem. The tools do not move until the mind employs them.