A doomed scenario for mankind

So, there is a Holy spirit, thank God.

And there is an unholy spirit.

What could it possibly do in these current times?

Just think of for example anything that involves a certain risk that can be controlled.

Like a self-driving car receiving an update to crash into people.

What if most people had a self-driving car, and at the same time they received a devious update to cause as many deaths as possible?

What also if there was some sort of implant into human brains, that received such an update?

Be warned.