There's a Black Mirror episode where soldiers are fighting against monsters, but one of the monsters stabs a soldier with an electric prod that turns out to be a device to disable the soldiers' brain implants, implants which are there to turn scared refugees into aggressive insect-like monsters, that the soldiers don't hesitate to shoot.

But we've learned the last 1.75 years that we don't actually need such implants, our brains are still very very capable of seeing our fellow humans as cockroaches. Actually even longer than that...