But, we're talking about this guy having access to 30 round clips. Why do you keep moving the goal posts and arguing over the most pedantic aspects of this issue.
Bottom line.
Evil exists. There are people that are going to try and massacre a bunch of other people every so often. And, if there's no one there to try and stop them, they will succeed. The more people equipped and trained to stop such tragedies, the more likely it is they will be prevented.
How do you know? Why don't you just say, I don't think I could do it so, therefore, it would be difficult for anyone else.
And I don't see any benefit to doing so. We simply disagree and that's okay.