I Don't Understand

I dont understand some people. I was watching America's Most Wanted earlier today and I got really upset watching one crime. A father and his 7 month old son went to go visit the child's Godfathers house. The father left the child in the car, walked up to the house and two men who I guess had beef with the godfather ran u pto the dad with guns to his head and forced themselves into the house. The father tried to turn and run for his son, but was shot twice and killed while the godfather managed to escape.
The two men gave chase and both noticed the baby sitting in his carseat when for no reason whatsoever, both men shot the child in the HEAD!!! They then left the scene and the Godfather ran to him calling for help. He did get help, but sadly the child died at the hospital. Who in their messed up mind would hurt an innocent child like that?! I don't understand that at all. It's not like the baby could identify them or be able to help catch them.
That story really got me upset and I was bawling my face off. Since having Sarah, anything that has to do with infants or small children for that matter gets me all emotional. I can actually relate to other perents now and know where they are coming from. I don't know what I would do if something horrible ever happened to my daughter. I hope to not ever go through an experience like that in my life.
I can't stand that mother of Caylee. How the hell can you just sit there for a fricken month before calling the cops to tell them that your daughter is missing!! Any mother or father in their right mind would call the cops right away if their child was missing for more than 24 hours and would have been knocking on peoples doors and getting friends and family to help them find their child right away! I also couldn't believe (in my eyes) how incompitent the authorities were including the bounty hunters in not keeping her locked up without bail and making her suspect number 1!! They knew she's a compulsive liar and from all of her recordings, she shows no emotion at all about her daughter along with the other evidence.
Now all of a sudden after they arrested her for identity theft and other charges, they then decide that she is a suspect in her daughters disappearance. HELLO!!!!!! I believe she killed her daughter and when the truth finally does come out, I hope or would wish that they would give her the same treatment that she did to her child. A child never asked to be brought into the world, but things happen and you are suppose to care and love your child keeping them safe. If they can't take care or have the means to provide for their child, there are other options than killing them or leaving them in the dumpster!!
I think some of the mothers who kill their children and then use the mental diability card so they don't get the death penalty or life really irk me and make me sick. Now I know there are some mothers out there who do have a chemical imbalance, but the ones who are perfectly sane and then clame a disorder that they don't actually have is just plain wrong and sick! I would love to pick at their brains to see just how they tick. I don't understand how GOD could create people like that.
Well actually GOD gave us brains and hoping that we would use our brains for good, but obviously that didn't really happen. I don't think I will ever understand the human mind and why people do the things they do. This was more of a vent than anything else.