His goal was obviously to wreak as much havoc as possible and he used guns; I'm not sure how it follows that if he didn't have access to guns he would have done

His goal was obviously to wreak as much havoc as possible and he used guns; I'm not sure how it follows that if he didn't have access to guns he would have done just as much damage. Also I don't know what the point is of arguing about how easy it would be to buy guns on a hypothetical black market, but I imagine it would be much closer to (I imagine) trying to hire a hitman than buy pot: you have to have connections, and if you don't you'll probably hire an FBI agent.