> I got downvoted for saying that maybe it's time to treat serious ransomware attacks (infrastructure, security, health, etc.) as terrorism - as in the sense that they're a threat to the national security.

A precise definition of terrorism tends to be difficult to pin down (mostly due to the difficulty of considering what is a legitimate asymmetrical warfare tactic by a nascent liberation movement versus an illegitimate terrorist act). But a general rule of thumb is that terrorism is a) violence b) directed at civilian populations c) to effect policy.

However, there are threats to national security that are not terrorist in nature; gang warfare in Mexico and Central America would be an example of such a threat.