The definition of terrorism isn't a "threat to national security". For example, your country could do something evil and wrong, grievously and unjustifiably vio

The definition of terrorism isn't a "threat to national security". For example, your country could do something evil and wrong, grievously and unjustifiably violating the interests of an entity with a military, and be deservedly subject to military action, constituting a threat to national security. That wouldn't be "terrorism", it would just be "military action".