You miss the whole point, Doug.
The purpose of agitprop is not to change your opponent's mind, it's to persuade the audience that there is a genuine debate in progress, that there is a legitimate controversy underway.
Religious debates play a similar role. The participants have no hope of altering their opposite number's views, they are going after the uncommitted. In that sense, there is a theological struggle going on in this country, one which Europeans had best be aware of because they will be affected by its outcome.