It's not new speak. It's a more accurate set of words to describe what we used to call "lone wolves". Stochastic means random, statistically measurable but not predictable.
The term "stochastic terrorism" means terror attacks like school shootings, swattings, and driving trucks into protestors that happen with a certain statistical likelihood, but whose individual events cannot be predicted.
The term "stochastic terrorism" means terror attacks like school shootings, swattings, and driving trucks into protestors that happen with a certain statistical likelihood, but whose individual events cannot be predicted.