"Reasonable gun control" is never going to prevent psychopaths from getting weapons to kill people. What it will prevent is normal people from being able to shoot a psychopath down as soon as something insane like this starts to happen. What do you think would have happened if every person in that theater had been packing and trained to use a gun? I live in a state with the lowest (or second lowest, depending on the year) crimerate in the country, and we have NO gun control laws. Concealed carry is allowed without a permit. A significant percentage of the population are hunters (or grew up hunting) and are well trained in gun safety. Ironically, we also happen to be one of the most liberal/progressive states in the countryI don't understand how the NRA has made such cowards of everyone. A baby was shot. Children were shot. And you know they're going to just double down and quash any attempt to have a conversation about reasonable gun control.
Unfortunately, we have Massachussetts to our south, with it's absolutely over-the-top nutso gun control, so that when my cousin needed to fly out of Boston airport to go home to Alaska, he had to leave all his guns with us because his car was designed for rural utility and not suburban lookniceitude (they don't allow the transportation of guns in a vehicle whose trunk can be accessed from inside the car).
[MOD EDIT: I've split these posts off from the "Things I Don't Understand" thread - the original quote is there]