es...likely he was nuts...
And if he didn't have a criminal record there was nothing to stop him from buying a gun....yes...we know, you fascists consider all Americans as criminals...but that isn't the way the system works....
How about this... you can't HAVE a gun until we have established you aren't crazy.
The fact is, someone this nuts was able to buy a weapon designed for the Soviet Army and mow down a bunch of shoppers, but you'll be here with your fucked up NRA talking points.
If the only way to prevent this is to take EVERYONE'S GUNS, so be it.
You set the rules.