It is more just that there are a wide variety of existing ways available to harm or kill the population. No need to invoke the specter that AI magic is going to

It is more just that there are a wide variety of existing ways available to harm or kill the population. No need to invoke the specter that AI magic is going to engineer some super bug. Plenty of virulent pathogens already around. You could trivially cause enormous harm by sabotaging electrical distribution, water treatment, hospitals, airports, etc. Go to any food manufacturer/distributor and contaminate the products with listeria or such.