I've only read into page 2 so far so I'm sure this has been pointed out by others by now...
but I just HAVE to say:
there is nothing whatsoever wrong with texting during the friggin' previews! They haven't even fully turned down the lights yet, people are still taking their seats, and the actual movie you paid to see is nowhere near starting these days when previews take about half an hour.
The whole point of "don't text during a movie" is that in the dark theater, your phone screen is very bright and can distract people visually from looking at the screen. I realize some people enjoy the previews, and that's fine, but again the lights are not yet fully down during them (usually) and even if they are, being distracted from previews is not any big deal to any sane person...
When someone's texting during the actual movie, and particularly if they keep at it, that's when politely saying something to them makes sense.
It is a horrible tragedy that this father in the prime of his life was killed while he had a family - particularly a 3 year old daughter who will probably not even remember him later in life. I don't know that I remember anything from when I was 3...
It is a sick example of how sometimes people in our society don't have the ability to defuse situations and control their anger and be civil in public. We've all seen people like this. Usually, they get into it with someone who is more sensible than them and who finds a way to defuse it. Occasionally, two hot heads will collide and neither will deescalate or defuse, and it reaches a boiling point and someone gets punched or, worst of all, someone gets stabbed or shot and dies. Sometimes people even unexpectedly die from a single punch, though it's rare.
Certainly, the gun made a death come out of a situation which almost certainly would not have resulted in one otherwise. Had the gun not been there, they could have been pried apart or cops called or theater management intervened or whatever, if they'd gotten into a wrestling match or something.
But I don't see the implications that a lot of the anti-gun people see in that fact... it's also true that if you had a horse and buggy accident in 1875 you were more likely to survive it than a modern car accident, because the speeds involved were so much less. Technology marches along, and it has it's good sides and it's bad sides. Sometimes the tradeoff we make for convenience and speed is that when those technologies malfunction or are misused, the results are nastier than before they existed. Then again, I'd rather be shot to death than killed with a claymore sword or something.
As others have said, this guy was a retired cop and would have been able to carry in what, all 50 states? Not clear on that, but it's silly to harp on Florida, gun laws, yadda yadda yadda.
This is a true tragedy, nobody should lose their life simply because they let their temper get the better of them or let someone else get a rise out of them.
I think all indications are these two were both douche bags to some degree. The guy getting upset at texting during the previews and harping on the guy even when he explained (seemingly) that it was going to be brief, and even going to management about it... that's a douche move. The other guy, if he threw popcorn or did anything which even came close to getting physical with an elderly man, rather than just moved seats with his wife to somewhere behind the guy, or whatever, or even just his decision to keep the argument going with the "oh so you went to the management?" etc, are all douche moves too. Though, from what I know so far, the dead man seems like less of a douche. I'd have to know exactly what he did right before the gunshot.
It's a tragedy regardless.
But adults are supposed to know that it's a big world, with tons of people, and if you have international media looking for these odd, rare situations to latch onto and sensationalize, they can have you believing that ANYTHING is an epidemic. They aggregate stories with blood and guts and they pull them from the entire country or even the entire world. In a world of 7 billion, there will always be a stream of nasty stories, and our interconnected world is getting better and better at not missing any of them.
Adults are supposed to know that shit happens, and not cry for knee-jerk, freedom-killing legislation in reaction to that.