Unfortunately true, Win.
But would you rather see those evil and mentally unstable people living in a country that readily provides them with any weapons of mass murder
they desire to have, just by going into a gun shop and buying them, no questions asked?
Or a country with very strict limits on who is permitted to buy guns?
Many, probably most of those mass shootings were committed with weapons legally bought by the perpetrator.
As a gun owner, I can provide you with some useful information. Not trying to change your mind.
The perpetrator may have legally purchased his gun, but he committed a crime by bringing it into CA from Nevada. It is illegal to bring an illegal weapon from one state where it is legal to own into another state where it is not legal. The rifle he used was legal to own - in Nevada, not CA. That is the fallacy with gun restrictions. Since he planned to commit mass murder, he obviously wouldn't care about committing the lessor crime of transporting an illegal weapon into CA. These mentally-unstable, hate-filled people are also willing to die, so they're not concerned with violating gun laws....or any laws.
Los Angeles also has laws about fireworks; they are illegal. That doesn't stop people from neighboring cities from driving 30 miles & buying fireworks & using them in Los Angeles.
CA has a 10-day wait before a gun is released. During that time, a detailed background check is completed. If the Dept. of Justice finds any felony or violence-related misdemeanor or Domestic Violence charges or a restraining order, the gun is not released.
Those restrictions DO NOT mean no one who shouldn't have a gun can ever get a gun. When things are illegal, black markets & private street sales happen; that's how gang members with felony convictions get all the guns they want. That's how people get cocaine or any other contraband. Burglaries are another way.
Here is another way criminals get guns, & it might shock you. Every police department has an evidence locker where guns, drugs & cash are stored. You may have heard about the "Rampart Scandal." Police officers (who have keys to the evidence lockers) were taking guns & drugs out of the evidence lockers & selling them on the street - at huge profits. Example: A gun that costs $600.00 retail goes for $5,000 - $6,000 on the street to a convicted felon who can't legally purchase a gun. The scandal was only discovered when Internal Affairs got suspicious when they learned of the lifestyle of cops that didn't match their salaries - and also a gun taken from a gang member was found to have come from a police evidence locker - matching serial number. After one officer was arrested, he was offered a plea deal if he implicated MANY other officers.