Terrorists do not in general seek to destroy humanity so this isn’t a substantial worry. You don’t outside Tom Clancy books see terrorists trying to start nuclear wars or spread a virus that kills off the vast majority of the human population.
Yet, at least. Hypothetical example: I wonder if something like the Voluntary Human Extinction Movement will eventually switch out the “Voluntary” in favor of “Mandatory”. But that’s speculative, and you are right empirically.