Actually, I agree. And if you read the whole account of the UT Tower shootings, you are awestruck by how well and almost naturally that law enforcement and citizens cooperated not only in putting an end to the thing, but putting themselves at risk to rescue the wounded even at their own peril.
Americans were wired to behave that way back in the 1960s. Now, too many of us are wired to run, hide and "wait for the authorities." So the whack-jobs operate with impunity.
Running and hiding, of course, is the prudent thing to do if you are unarmed, untrained and unable to help in any way. I'm not suggesting that everyone play hero. It is just that we had a much higher ratio of the population willing and able to do so back in the 1960s . . . and even today in certain conservative voting areas.