You can't lay blame on the people doing this and feel like you're done. Unfortunately they're always going to exist. You have to lay blame on the people defending against them. They failed in their defense and here we are.

The difficulty in stopping it scales with how long you let it fester.

Last time it was a world war which could have threatened extinction.

We're still in the phase where people are hoping doing nothing will make it all better or denying outright the threat.