The fact of the matter is that there will always people that do bad things in the world and there will always be bad people. There were 100 years ago, there are now, and there will still be 100 years from now. There will also be idiots that do stupid things that either get someone else killed, kill them, hurt them, etc over something stupid.
Just like the stories of people killing people for absolutely no reason or an entirely dumb reason. A person's whole life and future is over just because of some idiot doing something dumb or thinking they have a reason to kill somebody when they don't. It's even more sad to think how much of a waste of a death it is, to know that some person's life is over just because some idiot did something dumb or killed them for a dumb reason.
The scary thing about life in general, even though nobody should think about it really imo because it will just make you paranoid, is that our lives can be over in a second and we would never even know. One second a random thing could just happen and your life could be over.
There was a story just recently about two teenagers playing Pokemon GO that were shot at by a random man just because they were playing Pokemon GO near his house.
http://www.usatoday.com/story/tech/gaming/2016/07/16/pokmon-trainers-shot-palm-coast-florida/87207116/
The fact that these teenager's lives could be gone just because they were playing Pokemon GO is sad, and some idiot thought he had a reason to shoot them over it. Especially since he went outside to shoot at them, which is illegal since they weren't in his house so that man that shot should get jail time. Had they not drove away who knows if they would be alive today, and that's a scary thought and pretty sad to know their futures could be over because of some idiot that thought he had a reason when he didn't have one at all.
It's also why it's really sad when you hear the stories about people being shot by police even though they did absolutely nothing wrong, because it's such a waste and dumb reason to die. It's also horrible for the families to know that their loves ones are gone from this world when there was absolutely no reason for them to, all because some cop decided to get trigger happy when they had no reason to.
There was also another story not too long ago about someone getting killed for no reason because a cop accidentally shot his other cop partner and then blamed the suspect that was lying on the ground in handcuffs, in which both cops proceeded to murder the man. It was murder because the man had no weapon and was handcuffed and in no possible way would it have been self defense when he was already on the ground, one of the cops shot him 3 times in the back.
https://photographyisnotacrime.com/2015/12/19/los-angeles-deputy-shoots-partner-blames-suspect-both-kill-suspect-in-retaliation/
I'm posting those stories because it just shows examples of how someone's life can be over because of some idiot or idiots doing something dumb or just not caring enough about what consequences their actions will have on others.
As others have said, the only reason why it seems to happen more now is because social media is a huge thing in the world than it was a long time ago so it gets reported on more often.
The best way to look at life is to just not think about the bad and instead think about the good things in the world. Try to make a difference, try to do something good.