Issues about the haves and have nots has been around a long time. After WW 2 the Soviets and others weaponized people from the middle east to reek havoc on the West. The reformation of Israel made a good excuse also for them. There were others around the world who became empowered. After 9/11, it became official as citizens of the United States started to become the enemies to their own government. You see Biden as an enlightened Prog. He is nothing but a lifetime scab who has hurt the nation but threw a crumb or two to the privileged of the lower classes while impoverishing more and more of the same. Installing this potentate by fraud tells you the power of the elites.Kind of everything...
Okay, make it simple for you. Up until the 1970s, security on airlines was lax. After a bunch of needy people hijacked some planes to Cuba, they tightened up a bit. After some really evil people crashed some into buildings, they really, really cracked down. (Although if they listened to security experts earlier, that never would have happened.)
Social Media makes it easy to organize a flash mob. Now the flash mobs have figured that while stores are capable of dealing with single shoplifters, they can't deal with a mob.
So. Get rid of the vulnerabilities, just like the airlines did. No more open windows that can be easily broken, secure the entrance points, use better intelligence to identify the flash mobs.