Someone warned the FBI about the Florida shooter, but the Miami office never received the message so it did not investigate him.

That appears to have been a mistake. Surely the system can be improved, but there is no way to eliminate mistakes. The FBI may able to prevent some such killings, but it could never prevent them all.

A bigger obstacle is that lots of people show the general signs of being possibly murderous, and only a few of them go on to try to kill anyone. So it would take quite a few investigations to prevent one crime. That gets to the point of oppressing lots of people who have not and will not do anything criminal.

On the other hand, if we got rid of large magazines, those who decide to kill won't be able to kill so many people.

We should also consider following Canada's gun regulations. According to Bowling for Columbine, Canadians can own guns, but there are strict regulations about how to store and carry them, which reduce the use of guns to shoot at people.

The governor of Kentucky is so hot to deny medical care to poor people that he's willing to spend millions for the decrease in aid.

A Florida agency investigated the recent school killer, and concluded he wasn't likely to commit an actual crime.

Such estimates are inherently fallible. At least they looked at the situation.

For manipulating Americans, Facebook is the platform of choice.

Don't be so easy to manipulate — stop being a used of Facebook!

It was accepted constitutional law that the second amendment did conflict with gun control. Right-wing extremists campaigned for decades to gain enough power to change that.

Eliminating gun control, like eliminating abortion and birth control, are not really important to right-wing supporters. Rather, their leaders are expert at using these issues to build communities of supporters who are fanatical about them, and can then be led through them to support right-wing candidates in spite of all other issues and all their real interests.