It does. It also makes us more proficient defenders.
But the trick here is for us to stop being like our parents. Something bad happened and now the debate ensues as to which of our fundamental liberties we need to infringe to "make things better." The movie these people were seeing contained no shortage of innocent crowds of people being violently attacked.
One could have the knee-jerk reaction that the 1st Amendment has to go, that people shouldn't be allowed to make movies like this, under the premise that they inspire this behavior.
One could have the knee-jerk reaction that the 2nd Amendment has to go because the tools of self-defense can be abused to hurt people.
One could have the knee-jerk reaction that the 4th Amendment has to go because if the police had searched this guy's car at his last traffic ticket, they might have found incriminating content.
Just stop. These people have suffered a tragic loss, and people with empathy want to "do something" to make it better. But there are no quick fixes. The real fixes can only be tracked by the emotionally unsatisfying math that shows when you:
Fund the existing background check system's connection to the mental health care system (under laws that already exist), you make it harder for crazy people to buy guns.
Fund and fix education, you give young people options and opportunities to find things they are passionate about. It is from a large pool of hopeless, directionless youth that most violent criminals are drawn.
These solutions work, and there are others. But they work slowly over time. The goal of a high-opportunity society is achieved with patience and dedication. They don't "feel" like they are working in any one individual's life, the coefficients of variation are simply too high on any individual person's experience. But they show quite clearly in the math. To advance, we need to be the people who measure, understand and improve. The next Enlightenment will be data driven.
Who would be better suited toward trusting the math and working the solution that computer geeks. This is our problem to solve.