As with all propaganda, for it to be maximally effective the link between the message and the one benefitting from the action must not be revealed. It is a risky strategy for a party to employ their own violent party members. It is safer to provoke or incite others to carry out acts that scare people (e.g., baiting terrorists, or using hate speech to manipulate mentally disturbed persons to commit crimes), as long as this provocation or incitement is not generally understood by the electorate. In either case it may be expected that an electorate not trained in critical thinking will vote in higher numbers for the more hawkish party. Note that while hate speech is forbidden in most western countries, it is not banned in the United States of America.