The Mossad I would suppose, have clandestine operations. Almost every nation has disinformation specialists, counter-insurgency forces and cloak & dagger folks to help direct public sympathies. Such agencies, usually effected by a small number of operatives, are not unlike snipers..they have repercusssions way beyond what their numbers would seem to imply.
If any nation purposely disarmed themselves by removing this very effective, comparatively economical, operation..the ones responsible would be considered mentally deficient.
Still as many of us remember, the Clinton administration effectively emasculated the CIA; surrendering the use of this very valuable weapon to the enemy. In fact, shortly before Clinton left office, Jaime Gorelick a Clinton operative in the "justice" department, pushed for and got enacted a rule preventing the CIA and FBI from sharing intelligence.
.....then came 9/11...the FBI and CIA each had PART of the whole picture, but were not allowed to put the puzzle together !