The public understanding of Nuclear weapons as huge, potentially world ending threats is a brake on the development or deployment of smaller nukes.
Alas, this is simply not true - its too late for that brake to be applied. Micro-nukes are fully developed, and fully deployed. The general public already fatally tolerated their development during the Cold War.
This is why misanthropes feel comfortable in making these threats. “MAD is not relevant at these scales”, goes the insane argument.
If you want to do something about this in the Western world, well it is time to start holding our military masters to task for their insane weapons. Demand disarmament, and not just the state-killing sub-launched, easily tracked missiles - demand also that the suitcase nukes be removed from cities all over the world …