Unless we shut down physical borders that won't work because the developed world has travel open enough that hackers can travel to the country if their target,

Unless we shut down physical borders that won't work because the developed world has travel open enough that hackers can travel to the country if their target, setup the attack, and leave. A few months later it executes and we're in the same boat as before, albeit with an additional speed bump for the hackers. Or it will just be home grown criminals doing the same thing.