Thanks for your response.
I have some factors I observed. Correct them if incorrect as I am not subject matter expert.
1. The most of the blame must go to Nikolas Cruz, the shooter himself. I am sure all agree. He is just a bad guy.
2. The probablility of the existence of a bad guy like Nikolas Cruz is equal everywhere either US or non-US. I am sure most agree.
3. The probability of mass shooting occurrence is highest in US compared to outside of US. This is just fact.
4. More good guys with a gun also may also cause more bad guys with a gun. Perhaps 3 tells that more good guys with a gun somehow results in far more bad guys with guns ( we are outgun by bad guys...lol).
These factors point there is somethng different in US compared to non US. Perhaps it can be more narrowed to gun policy.
When it comes to gun policy, there is somehing fundamentally different in US,which is 2nd amendament that is part of US history
With having said that, who make gun policy out of 2nd amendament? Politicians.
So I want to blame politicians (not NRA) 2nd most after the shooter... I start to believe they sort of tranformed 2nd Amendament into some kind of "profit sharing" model...their integrity compromised.
The goal of gun makers is to sell most guns and there is nothing wrong with it. The gun owners want to keep their guns... I am sure there may be a policy that makes all happy.
The problem is that it may not be the interest of law makers. This smart kid challenged to break this conflitc of interest...
Here is some exmaples of fishing-up politician with their own purpose.
Parkland dad says we have no right to bring our own water bottle into airplane. But 18 year old kid has the right of buying .223 caliber semi-automatic rifle at Oscar mayer's.
The gun seller told CNN 18 year old kid has right to buy AR15 but has no right to buy handgun until he gets 21 year old...
bump stocks is legal while full-automatic rifle is illegal.
I am sure there are more...
Here is perhaps one more.
.223 or Nato 5.56mm like small-diameter bullet deals far more demage than other bigger bullets. As the ballistic science of these bullets in terms of velocity and diameter is specially designed to damage humane tissue most. It basically travels air with good ballistic stability and straight line due to light weight. But its stabilty get lost immediately when it penetrates human body; the bullet rotates in a big unstable circle, which results in much bigger hole perhaps in scale of several ten times than its diameter if it penetrates. Bigger bullet like 9mm doesn't lose much its stabilty when it penetrates body so that it can just go through... This may be one of reason Nato 5.56mm is most popular in western militaries for assualt rifles and more deadly than 7.62mm used by AK47...When it hits human body, the chance of kiling it is very high... a couple of bullets may be enough... I personally believe there has to be some reasoanale restrcition on rifles using this kind of ballistic science behind. Perhaps, this 18 year old kid chose AR15 becasue that was only gun he could buy legally (and ironically, it was one of most deadly gun available in civilian consumer market) . But the last vegas shooter chose AR15 while he may have many other choices.
